# Blockstream

**Canonical:** https://apis.io/providers/blockstream/  
**APIs profiled:** 7

Blockstream is a Bitcoin infrastructure company whose products include the Liquid Network sidechain, the Green self-custody wallet, Blockstream Satellite, and Bitcoin mining and data services. For developers its flagship public API is Esplora, the open-source Bitcoin block explorer behind blockstream.info: a no-authentication HTTP REST API for reading blocks, transactions, addresses, scripthashes, the mempool, and fee estimates across Bitcoin mainnet, testnet, and signet, plus Liquid/Elements issued assets. Amounts are returned in satoshis and hashes are hex-encoded, with cursor pagination over confirmed transaction history. Blockstream also ships GDK, its open-source cross-platform wallet SDK.

## Kin Score — 30.0 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 30.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 46.2 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 19.2 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Open access — onboarding: open, pricing: unknown, trial: no (confidence: medium).

## APIs (7)

- **Blockstream Addresses API** — The Addresses API from Blockstream — 11 operation(s) for addresses.
- **Blockstream Assets API** — The Assets API from Blockstream — 7 operation(s) for assets.
- **Blockstream Blocks API** — The Blocks API from Blockstream — 11 operation(s) for blocks.
- **Blockstream Fee Estimates API** — The Fee Estimates API from Blockstream — 1 operation(s) for fee estimates.
- **Blockstream Mempool API** — The Mempool API from Blockstream — 3 operation(s) for mempool.
- **Blockstream Mining API** — The Mining API from Blockstream — 1 operation(s) for mining.
- **Blockstream Transactions API** — The Transactions API from Blockstream — 10 operation(s) for transactions.

## MCP servers (1)

- **Blockstream MCP Server**

## Security (2)

- **Blockstream Authentication** — 0 schemes
- **Blockstream Domain Security** — TLSv1.3 · HSTS · DNSSEC

## Tags

Company, Bitcoin, Blockchain, Cryptocurrency, Block Explorer, Financial-Services, Infrastructure

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/blockstream/). Scores are computed from the provider's own public artifacts under a published rubric.