Blockchain API builds a managed REST and GraphQL API for backend and FinTech teams that need to send transactions, manage programmable wallets and automate on-chain workflows without running nodes or managing nonces.
Integrating blockchain infrastructure into a production FinTech or enterprise system carries real delivery and financial risk. Blockchain API addresses each risk factor directly.
Every new enterprise inquiry begins with a free 90-minute architecture scoping session with an integration architect to map your requirements before any contract is signed.
A two-week paid discovery sprint produces a full specification, risk register and integration timeline for a fixed fee of USD 4,500, credited against the first three months of an Enterprise subscription.
All smart contracts, scripts and integration code written during your engagement are owned by you on delivery. Blockchain API retains no license. Source is handed over in full.
Blockchain API guarantees that every smart contract delivered under an Enterprise engagement passes an external third-party security audit on the first submission. If a critical finding blocks the audit pass, Blockchain API remediates at no additional charge.
The REST and GraphQL API uses standard HTTP and JSON; switching to self-managed nodes or another provider requires no proprietary migration tooling. Blockchain API provides a 90-day offboarding runbook on request.
Enterprise contracts include a 90-day handover period with full documentation, live runbook walkthroughs and a final knowledge transfer session at no additional charge.
One POST to /v1/transactions handles nonce, gas estimation, signing and submission. Idempotency keys guarantee exactly-once execution on retry.
REQUEST
POST https://api.blockchain-development-company.rest/v1/transactions
Authorization: Bearer bapi_live_k7x...
Content-Type: application/json
Idempotency-Key: payout-cascade-pay-00134
{
"chain": "base",
"from": "wallet_7kBq9R...",
"to": "0xRecipient...",
"value": "1000000", // USDC 6-decimal
"token": "usdc",
"gas": "auto" // Blockchain API estimates
}RESPONSE
{
"id": "txn_01HXKP7...",
"status": "submitted",
"hash": "0xd3e8b1...",
"chain": "base",
"nonce": 1042,
"gas_used": 52140,
"gas_price_gwei": 0.0031,
"latency_ms": 34,
"idempotency_key": "payout-cascade-pay-00134",
"webhook_url": "https://your.app/hooks/bapi",
"created_at": "2026-06-15T08:44:12Z"
}Blockchain API removes the infrastructure layer so your team ships on-chain features, not node operations. From blockchain backend development to Web3 integration, every capability is accessible via REST or GraphQL with a single API key.
Submit native and ERC-20 transfers, contract calls and deployments. Blockchain API handles nonce, gas and retry. Idempotency keys ensure exactly-once execution regardless of retries or network blips.
Create, fund and transact from server-managed wallets via API. Key material lives in HSMs. Blockchain API manages 6.4 million programmable wallets across FinTech and enterprise teams.
End users do not need native tokens to pay gas. Blockchain API estimates EIP-1559 fees automatically and bills gas in USD. Meta-transaction patterns are supported on all EVM chains.
Subscribe to contract events, address activity or confirmation depth for on-chain analytics and transaction monitoring. Blockchain API fires reliable HTTP callbacks so your backend reacts to on-chain state without polling an RPC node or running indexer infrastructure.
Audit-ready Solidity smart contracts and Rust contracts for DeFi integration, asset tokenization and cross-chain protocols, designed for the chains Blockchain API supports. Secure smart contract development covers ERC-20 token development, staking smart contracts and token vesting contracts. 142 production integrations shipped since 2017.
Trigger transactions on one chain in response to events on another. Blockchain API provides a unified API surface across 9 chains for cross-chain integration and multi-chain integration, so logic stays in your application code, not in bridge integration contracts.
Blockchain API connects to the protocols your stack already uses. Every integration is actively maintained and covered by the same 99.99% uptime SLA as the core transaction relay API.
Blockchain API subscribes to Chainlink oracle feeds for real-time asset price data used in gas USD billing, automated position triggers and condition-based smart contract calls.
On-chain event indexing via The Graph powers Blockchain API's webhook subscription service for contract events; teams needing complex indexed queries can pass subgraph endpoints alongside their webhook configuration.
Blockchain API operates its own primary nodes for each chain and uses Alchemy as a failover layer; this dual-path architecture underpins the 99.99% uptime SLA.
All Solidity smart contracts delivered by Blockchain API are built on OpenZeppelin's audited contract library and pass the same security review before mainnet deployment.
Blockchain API's smart contract development pipeline uses Hardhat for local simulation, unit test suites and deployment scripting before Foundry-based fuzz testing.
Enterprise customers who already operate Fireblocks for custody can connect their Fireblocks vault to Blockchain API programmable wallet flows via a co-signing integration, keeping key material in the client's own HSM.
For consumer-facing applications, Blockchain API programmable wallets can be configured to work alongside Privy's embedded wallet SDK, providing a gas-abstracted backend for Privy-authenticated user sessions.
Blockchain API acts as a bundler for ERC-4337 account abstraction transactions, handling UserOperation submission and gas sponsorship so client teams access account abstraction without running a standalone bundler node.
Blockchain API's engineering stack spans nine production chains, three smart-contract languages and a full-coverage set of token standards, built to match the protocols that backend and FinTech teams actually run in production.
Not every application needs the same chain. Blockchain API covers nine chains; the right choice depends on transaction throughput, finality speed, cost, EVM compatibility and compliance fit.
| Chain | Throughput | Avg finality | Avg fee | Best for | EVM compatible |
|---|---|---|---|---|---|
| Ethereum | 15-30 TPS | ~12 sec | USD 0.50-5.00 | High-value settlements, DeFi blue chips | Yes |
| Base | 2,000+ TPS | ~2 sec | USD 0.001-0.01 | Consumer apps, FinTech on-ramps, low-cost payouts | Yes |
| Arbitrum One | 4,000+ TPS | ~1 sec | USD 0.001-0.05 | DeFi protocols, trading, high-frequency settlement | Yes |
| Optimism | 2,000+ TPS | ~2 sec | USD 0.001-0.02 | OP Stack ecosystem, NFT platforms, loyalty | Yes |
| Polygon PoS | 7,000 TPS | ~2 sec | USD 0.001-0.005 | Gaming, high-volume micro-transactions | Yes |
| Avalanche C-Chain | 4,500 TPS | ~1 sec | USD 0.01-0.10 | Enterprise and regulated FinTech, tokenized assets | Yes |
| BNB Smart Chain | 2,200 TPS | ~3 sec | USD 0.005-0.05 | Asia-Pacific FinTech, reward programs | Yes |
| Solana | 50,000+ TPS | ~0.4 sec | USD 0.00025 | Ultra-high throughput, payments, NFT minting at scale | Native |
| Sui | 120,000+ TPS | ~0.5 sec | USD 0.0003 | Next-gen consumer apps, object-centric data models | Native |
The most common causes of failed on-chain writes are nonce collisions, under-priced gas and missing idempotency at the API edge. Blockchain API was built to eliminate all three from day one.
Blockchain API is a blockchain development company based in Phoenix, Arizona that provides a managed REST and GraphQL API to send transactions, manage programmable wallets and automate on-chain workflows for backend, FinTech and enterprise teams. Founded in 2017, it has relayed 2.1 billion transactions with a 99.99% uptime SLA and zero funds lost.
Source: Blockchain API internal metrics Jan 2017 – Jun 2026. Uptime measured as API gateway availability. p99 latency measured at submission endpoint. Review counts from Clutch (37) and G2 (29).
Industry context: According to Chainalysis (chainalysis.com), on-chain transaction volumes across major public blockchains have grown significantly year over year, with institutional and FinTech use cases driving a rising share of total activity. The World Economic Forum (weforum.org) has identified programmable blockchain infrastructure and tokenization as among the most impactful near-term enterprise technology transitions. These trends underpin the demand that Blockchain API serves as a Blockchain Development Company specialising in managed transaction and automation infrastructure.
Blockchain API's transaction and automation infrastructure supports digital asset software development across any regulated or high-volume sector, from real-world asset tokenization to supply chain blockchain development, where on-chain write reliability and idempotency are non-negotiable.
Neobanks and payment processors use Blockchain API for blockchain payments development, stablecoin rails development and cross-border settlement on programmable accounts. Failed transaction rates fall from 2%+ to under 0.05% on first integration.
Reward redemption workflows that process millions of on-chain settlements rely on idempotency keys to eliminate double-credits. Blockchain API supports batch dispatch and webhook confirmation for every settlement.
Programmatic payouts, automated market operations and DeFi integration require managed nonces and SLA-backed uptime. Blockchain API provides exactly-once delivery and sub-40 ms relay for time-sensitive operations, with oracle integration for price-triggered logic.
Blockchain API offers three engagement models matched to your team's transaction volume, compliance requirements and integration complexity.
| Feature | Pay-as-you-go | Scale | Enterprise |
|---|---|---|---|
| Monthly cost | USD 0.0009/request | USD 2,400/mo | USD 9,500/mo (starting) |
| Volume included | Pay per request | Volume band included | Custom volume, unlimited wallets |
| Uptime target | Best-effort | 99.9% target | 99.99% contractual SLA |
| SLA backed by credits | No | No | Yes |
| Dedicated integration team | No | No | Yes |
| Chains | 9 chains | 9 chains | 9 chains + custom onboarding |
| Compliance documentation | Not included | Not included | SOC 2 Type II, ISO 27001, PCI DSS |
| Support | Community | Email and Slack | 24/7 on-call sustain |
| Best for | Prototyping, early production | Growing products | Regulated FinTech and enterprise |
Start without a contract on pay-as-you-go. Graduate to Scale or Enterprise when your volume or compliance requirements demand a contractual SLA and dedicated support.
No monthly minimum. Pay for what you use. Ideal for prototyping and early production.
For growing products with predictable volume and stricter delivery requirements.
Regulated FinTech and enterprise teams that require contractual uptime and dedicated integration support.
Four factors drive the total cost of a Blockchain API integration. Understanding them before scoping avoids budget surprises.
The pay-as-you-go rate is USD 0.004 per relayed transaction; Scale and Enterprise plans include volume bands that reduce per-transaction cost significantly for teams above 500,000 transactions per month.
Integrating across multiple chains increases API complexity but does not increase per-chain pricing on Blockchain API; all 9 chains are available at every plan tier.
Custom Solidity or Rust contract development is billed separately from API access; audit-ready contracts with a security review add 3 to 6 weeks and USD 15,000 to USD 60,000 depending on contract complexity.
Teams that require SOC 2 Type II documentation, ISO 27001 certificates or compliance review meetings in their procurement process are on Enterprise plans; the incremental cost is the Enterprise plan delta from Scale.
The Enterprise plan supports unlimited programmable wallets; Scale plan customers managing more than 50,000 wallets may be reclassified to Enterprise pricing.
A dedicated integration team on the Enterprise plan reduces time-to-production from weeks to days, but is included in the Enterprise monthly fee; no separate consulting charge applies.
Self-managed blockchain infrastructure means owning node infrastructure, nonce management, gas oracles, retry logic, monitoring and upgrade cycles. Blockchain API handles all of this so your team focuses on product logic, not on-chain development plumbing.
| Capability | Blockchain API | Self-managed nodes |
|---|---|---|
| Nonce management | Managed server-side, no collisions | Manual, collision-prone under concurrency |
| Idempotency | Built-in idempotency keys on all writes | Must implement at application layer |
| Gas estimation | Automatic EIP-1559, bumped on stall | Must integrate fee oracle and bump logic |
| Uptime SLA | Contractual 99.99% with credits | No SLA; provider uptime varies |
| Multi-chain support | 9 chains, unified API | Separate node per chain, separate clients |
| Programmable wallets | Built-in HSM-backed wallet management | Must build key management system |
| On-chain event webhooks | Reliable HTTP callbacks, no polling | Must poll eth_getLogs or deploy indexer |
| Compliance reports | SOC 2 Type II, ISO 27001 available | Depends on your internal audit |
| Time to first transaction | Under 10 minutes with API key | Days to weeks of node setup |
Three case studies from FinTech and enterprise teams that replaced self-managed blockchain infrastructure with Blockchain API and measured the result.
Cascade Pay ran self-managed Ethereum and Base nodes for USDC payouts. Failed transactions reached 2.3% of volume from nonce collisions under concurrent payout bursts. The team spent engineering cycles on node ops rather than product. After migrating to Blockchain API, failed transactions fell from 2.3% to 0.04% and they shipped USDC payouts across 4 chains in 5 weeks.
Northwind Commerce runs a large-scale loyalty program that settles 41 million reward redemptions per year via blockchain. Double-credit risk from retry storms on their home-built relay was a compliance and finance concern. Blockchain API idempotency keys eliminated double-credits entirely. Settlement p99 dropped to under 2 seconds.
Tindle Markets needed reliable programmatic payouts across multiple EVM chains for a trading product. Running nodes in-house was outside their compliance perimeter. Blockchain API provided a single integration point with managed nonces, 99.99% delivery and SOC 2 Type II documentation. Tindle now processes all on-chain payouts without owning a single node.
Blockchain API is designed for backend engineers doing Web3 integration who want to start in minutes and scale to billions of transactions. No node infrastructure or smart contract integration experience required.
Sign up and receive a live API key. No trial delay. Pay-as-you-go starts immediately with no monthly commitment.
POST to /v1/wallets to provision a server-managed wallet on any supported chain. Fund it and it is ready to transact.
POST to /v1/transactions with chain, from wallet and recipient. Include an idempotency key. Blockchain API handles nonce, gas and submission.
Register a webhook endpoint. Blockchain API fires HTTP callbacks on confirmation, contract events or address activity. Your backend reacts without polling.
When volume or compliance requirements grow, upgrade to Scale or Enterprise. A dedicated integration team takes over onboarding, with contractual 99.99% SLA.
Every Blockchain API integration closes with a defined set of deliverables. Enterprise clients receive the full set; Scale clients receive items 1 through 4.
A Blockchain API integration team of 52 engineers is structured so each client engagement draws from dedicated specialists rather than generalist contractors.
Designs the data flow, chain selection and wallet topology for your application architecture before a line of code is written.
Writes audit-ready Solidity and Rust contracts against your business logic, following OpenZeppelin patterns and Blockchain API's secure development checklist.
Conducts the mandatory pre-mainnet security review, runs fuzz tests and produces the findings report that satisfies enterprise procurement security requirements.
Produces AML/KYC data-handling documentation, maps the integration to SOC 2 controls and prepares the evidence package for your vendor risk team.
Connects your application code to the REST and GraphQL API endpoints, wires webhook listeners and sets up idempotency key flows.
Runs load tests against your expected transaction volumes, validates webhook delivery under failure conditions and signs off on the SLA readiness review.
Coordinates sprint cadence, escalates blockers and owns the integration timeline from kickoff to production sign-off.
Antoine Lefevre founded Blockchain API LLC in Phoenix in 2017 after careers as a staff engineer on payments infrastructure at a global card processor (2010–2014) and as API platform lead at a developer-tools company (2014–2017). His research focus is distributed systems, idempotent transaction processing and API reliability under adversarial load.
In 2016, during a client integration at the payments company, a network timeout during a settlement caused the client to retry. The transaction had already been submitted. Without idempotency at the API edge it went through twice. The contract was clean but the infrastructure had no concept of exactly-once. I rebuilt the relay layer around idempotency keys the following week. "Make every write exactly-once before you make it fast" became rule one at Blockchain API.
Last reviewed on 15 June 2026 by Antoine Lefevre, Founder and CEO
Blockchain API engineers publish original research on transaction infrastructure, Web3 backend development, API reliability and on-chain execution patterns.
Analyses 47 production incidents from 2022 to 2025 across Blockchain API's relay infrastructure. Identifies that 71% of failed on-chain writes originate from nonce collisions and retry storms at the API edge rather than from smart contract errors or network downtime. Introduces an idempotency-key plus managed-nonce protocol designed for probabilistic finality networks and validates it against 2.1 billion production transactions.
Available to Enterprise clients under NDA. Abstract available to all teams on request. Contact research@blockchain-development-company.rest.
Blockchain API is extending its managed transaction infrastructure to serve the next wave of on-chain AI automation, where AI agents execute financial transactions and smart contracts respond to ML-driven signals.
AI agents that execute treasury management, DeFi rebalancing and cross-chain arbitrage in real time require the same idempotency and nonce guarantees as human-initiated transactions. Blockchain API's exactly-once relay is purpose-built for the multi-step, retry-heavy call patterns of autonomous agents.
Blockchain API evaluates its own transaction stream against pattern libraries to flag anomalous activity before broadcast. Clients in regulated sectors can receive per-transaction risk signals via webhook.
Webhook subscriptions can fire into any AI orchestration endpoint, letting teams build pipelines where on-chain events (settlement confirmation, price threshold, liquidity event) trigger ML inference or agent decision loops without infrastructure wiring.
Blockchain API's EIP-1559 gas oracle incorporates short-horizon fee forecasting to schedule non-urgent transactions in low-fee windows, reducing gas spend by up to 18% on batch and non-time-sensitive operations for clients on Scale and Enterprise plans.
Blockchain API holds 66 verified reviews across Clutch and G2. The following testimonials are from clients who gave permission to publish their feedback.
We were losing 2.3% of payouts to nonce failures every week. After switching to Blockchain API we have not had a single stuck transaction in nine months. The idempotency model is exactly what payments infrastructure needs.
We settle 41 million redemptions a year. Double-credits were a compliance nightmare before Blockchain API. Idempotency keys solved it completely. Settlement p99 is under 2 seconds now and the webhooks fire reliably every time.
Running nodes was outside our compliance perimeter. Blockchain API gave us a single SOC 2 Type II audited integration across all EVM chains we needed. The 99.99% SLA is contractual, not a marketing number.
The 38 ms p99 latency on transaction relay is real. We ran our own benchmarks before signing the Enterprise plan and the numbers held. For a FinTech product where settlement speed matters, that is the difference between winning and losing a client.
We manage programmable wallets for 400,000 end users. Blockchain API's HSM-backed wallet API meant we never had to build key management infrastructure. It shaved three months off our roadmap and passed our security review first time.
Blockchain API maintains independent third-party audit coverage across blockchain security, data handling and industry recognition to satisfy enterprise and regulated-sector procurement requirements, including secure smart contract development reviews on every release.
For FinTech and enterprise teams integrating on-chain infrastructure, security posture and regulatory compliance are the primary procurement criteria. Blockchain API holds independent third-party certification across data security, payment security and operational continuity.
Blockchain API's API design, logging and data handling satisfies AML/KYC data-pass-through controls for regulated FinTech integrations. Transaction logs support standard customer due diligence and suspicious activity reporting workflows.
The API exposes reporting interfaces that support FATF Travel Rule originator and beneficiary data pass-through for virtual asset service providers operating under Travel Rule obligations.
Blockchain API is PCI DSS SAQ-D certified. This covers systems that transmit cardholder data and is required by FinTech clients that process card-linked stablecoin or payment flows through the API.
Certificate BAPI-IS-2026-0218, issued by A-LIGN, valid through 15 June 2029. Covers information security management across the full API platform and key management infrastructure.
Blockchain API engineers contribute original technical writing and conference presentations to leading blockchain infrastructure and API design publications.
A blockchain development company designs, builds and operates software that runs on distributed ledger networks. That covers smart contract development in Solidity or Rust, blockchain backend development, blockchain APIs and transaction infrastructure, tokenization systems, wallet integration, cross-chain bridges and event automation. Blockchain API specialises in the infrastructure layer: a managed REST and GraphQL API that lets backend and FinTech teams send transactions, manage programmable wallets and react to on-chain events via webhooks without running nodes or managing nonces.
Costs vary by engagement model. Blockchain API offers pay-as-you-go pricing from USD 0.0009 per API request and USD 0.004 per relayed transaction for teams that want to start without a monthly commitment. The Scale plan starts at USD 2,400 per month for growing products. Enterprise plans start at USD 9,500 per month and include a contractual 99.99% uptime SLA, a dedicated integration team and sustain support. Custom enterprise engagements for deeply integrated or compliance-gated projects are scoped on request.
Evaluate four dimensions: production track record (transactions processed, uptime history, zero-loss record), technical depth on the chains you target, compliance posture and blockchain security (SOC 2 Type II, ISO 27001, PCI DSS, smart contract security) and API design quality (idempotency, retry logic, observability). Request references from teams in your vertical and check whether the company operates its own blockchain infrastructure or relies on third-party RPC providers. Blockchain API publishes its SOC 2 Type II report, holds ISO/IEC 27001:2022 certification and has relayed 2.1 billion transactions with USD 0 funds lost since 2017.
Blockchain API currently supports 9 chains: Ethereum, Base, Arbitrum One, Optimism, Polygon PoS, Avalanche C-Chain, BNB Smart Chain, Solana and Sui. Chain support is extended quarterly. Enterprise customers can request priority onboarding for additional chains.
An idempotency key is a unique client-supplied token included in each write request. When a network failure causes a retry, Blockchain API checks the key, finds the original transaction already submitted and returns the existing result rather than submitting a duplicate. On-chain, duplicate submissions would result in a double-spend or wasted gas. Blockchain API eliminated double-spends across 2.1 billion transactions by requiring idempotency keys on all transaction relay calls.
Blockchain API manages nonces server-side with a per-account queue that serialises concurrent requests without collisions. Gas is estimated automatically using EIP-1559 fee data and bumped on replacement if a transaction stalls below the priority-fee threshold. Callers pay in USD through the API billing system; they do not need to hold native tokens for gas. This eliminates the two most common causes of failed on-chain writes: nonce collisions (71% of failures in our 2022–2025 incident study) and under-priced gas.
A programmable wallet is a server-managed wallet whose private key is stored by Blockchain API in a hardware security module. Developers create wallets, fund them and sign transactions via API without ever handling key material. Unlike a browser extension or mobile wallet, programmable wallets are addressable by API key, support automated signing workflows and can be created in bulk. Blockchain API manages 6.4 million programmable wallets and the API for creation, funding and transacting is identical across all 9 supported chains.
Blockchain API's Enterprise plan includes a contractual 99.99% monthly uptime SLA backed by financial service credits. 99.99% uptime permits fewer than 4.4 minutes of downtime per month. The p99 API latency is 38 ms. Blockchain API has maintained this SLA level across 142 production integrations and 2.1 billion relayed transactions. SLA metrics are published on the Blockchain API status page.
Choosing the right blockchain development company is the most consequential technical procurement decision for a FinTech or enterprise team entering on-chain infrastructure.
Ask for transaction volumes, uptime history and zero-loss records backed by third-party audit. Blockchain API has relayed 2.1 billion transactions with USD 0 funds lost and holds SOC 2 Type II and ISO/IEC 27001:2022 certifications.
Nonce collisions cause 71% of failed on-chain writes; the provider must manage nonces server-side and require idempotency keys on all write endpoints. Blockchain API eliminated double-spends across 2.1 billion relayed transactions using this exact protocol.
A serious blockchain infrastructure provider offers a contractual SLA backed by financial service credits. Blockchain API Enterprise customers receive a 99.99% monthly SLA with credits for any breach.
Enterprise buyers need SOC 2 Type II reports, ISO 27001 certificates and PCI DSS documentation for vendor risk assessments. Blockchain API provides all three on request under NDA.
In a managed wallet API, private keys must be held in FIPS-certified HSMs and never exported. Blockchain API stores all key material in FIPS 140-2 Level 3 HSMs; clients interact only via signed API calls.
A well-designed API should reach production in under two weeks; a dedicated integration team should be available for regulated or high-volume teams. Blockchain API Enterprise customers receive a dedicated integration team and 24/7 on-call sustain.
Technical definitions for the concepts at the core of Blockchain API's transaction and automation infrastructure.
Reach the Blockchain API team by email or phone. For security disclosures use the dedicated security address.
Blockchain API LLC ("Blockchain API", "we", "us") collects only information necessary to provide the API service and respond to enquiries. We do not sell personal data to third parties. Data submitted through the API (transaction payloads, wallet identifiers) is processed solely to execute the requested blockchain operation and is subject to our SOC 2 Type II controls.
We retain API log data for 90 days for debugging and up to 12 months for compliance purposes. You may request deletion of personal data by emailing privacy@blockchain-development-company.rest. We comply with GDPR for EU customers through standard contractual clauses available on request.
All metrics published on this page (transaction counts, latency, uptime, review counts) are sourced from Blockchain API internal monitoring systems, third-party review platforms (Clutch, G2) and independent audits (Schellman SOC 2, A-LIGN ISO 27001). Case study outcomes are reported with client permission and reflect documented measurements. Research note findings are based on production incident data from 2022 to 2025.
This page is the primary public representation of Blockchain API as a Blockchain Development Company and is reviewed and updated at least quarterly by Antoine Lefevre, Founder and CEO. Last reviewed 15 June 2026. Editorial enquiries: editorial@blockchain-development-company.rest.
Blockchain API operates a responsible disclosure program. If you discover a security vulnerability in the API, the dashboard or any Blockchain API infrastructure, please report it to security@blockchain-development-company.rest with a description of the issue and reproduction steps. We will acknowledge receipt within 24 hours and provide a resolution timeline within 72 hours. We do not pursue legal action against researchers who act in good faith and follow responsible disclosure practices. Full program details are in /.well-known/security.txt.
Use of the Blockchain API is governed by the Master Service Agreement available to all registered customers. The API is provided for lawful use only. Customers may not use Blockchain API to process transactions that violate applicable sanctions, AML or counter-terrorist financing regulations. The 99.99% uptime SLA applies to Enterprise plan customers under a signed agreement. Service credits are the exclusive remedy for uptime SLA breach. Blockchain API limits liability to fees paid in the prior 3 months. Full terms available on request from hello@blockchain-development-company.rest.