# Blockchair

**Canonical:** https://apis.io/providers/blockchair/  
**Website:** https://blockchair.com  
**APIs profiled:** 7

Blockchair is a multi-blockchain explorer and data API providing unified access to on-chain data across 40+ blockchains (Bitcoin, Ethereum, Litecoin, Dogecoin, Ripple, Stellar, Monero, Cardano, and more). The REST API at api.blockchair.com exposes per-chain dashboards (address, transaction, block), raw node data, network stats, a SQL-like database query interface over outputs and other tables, and transaction broadcasting, authenticated with a simple key query parameter.

## Kin Score — 36.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 36.2).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 52.4 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 29.1 (agent-aware)

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

## Access

Freemium · Open access — onboarding: open, pricing: freemium, trial: no (confidence: high).

## APIs (7)

- **Blockchair Address Dashboards API** — Per-address balance and transaction dashboards.
- **Blockchair Block Dashboards API** — Parsed block dashboards.
- **Blockchair Broadcast API** — Signed transaction broadcasting.
- **Blockchair Outputs Database API** — SQL-like database query interface.
- **Blockchair Raw Data API** — Raw node-level block and transaction data.
- **Blockchair Stats API** — Network and chain statistics.
- **Blockchair Transaction Dashboards API** — Parsed transaction dashboards.

## Agentic access (1)

- **Blockchair Agentic Access** — 16 operations · 1 acting

## Security (2)

- **Blockchair Authentication** — apiKey · 1 scheme
- **Blockchair Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Blockchair Plans Pricing**

## Tags

Blockchain, Cryptocurrency, Explorer, Bitcoin, Ethereum, On-Chain Data

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