Blockchair

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.

Blockchair publishes 7 APIs on the APIs.io network, including Address Dashboards API, Block Dashboards API, Broadcast API, and 4 more. Tagged areas include Blockchain, Cryptocurrency, Explorer, Bitcoin, and Ethereum.

Blockchair’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.2/100 thin ▬ flat Agent 29/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumOpen⚡ Free to try

7 APIs

BlockchainCryptocurrencyExplorerBitcoinEthereumOn-Chain Data

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 36.2/100 · thin

Contract Quality 13.1 / 25

Developer Ergonomics 3.3 / 20

Access Clarity 7.9 / 20

Operational Transparency 4.4 / 13

Contract Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 29/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/blockchair: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

Blockchair Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: blockchair
url: https://raw.githubusercontent.com/api-evangelist/blockchair/refs/heads/main/apis.yml
name: Blockchair
kind: company
description: 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.
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/blockchair.png
tags:
- Blockchain
- Cryptocurrency
- Explorer
- Bitcoin
- Ethereum
- On-Chain Data
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
apis:
- aid: blockchair:blockchair-address-dashboards-api
  name: Blockchair Address Dashboards API
  description: Per-address balance and transaction dashboards.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Address Dashboards
  properties:
  - type: OpenAPI
    url: openapi/blockchair-address-dashboards-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-block-dashboards-api
  name: Blockchair Block Dashboards API
  description: Parsed block dashboards.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Block Dashboards
  properties:
  - type: OpenAPI
    url: openapi/blockchair-block-dashboards-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-broadcast-api
  name: Blockchair Broadcast API
  description: Signed transaction broadcasting.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Broadcast
  properties:
  - type: OpenAPI
    url: openapi/blockchair-broadcast-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-outputs-database-api
  name: Blockchair Outputs Database API
  description: SQL-like database query interface.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Outputs Database
  properties:
  - type: OpenAPI
    url: openapi/blockchair-outputs-database-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-raw-data-api
  name: Blockchair Raw Data API
  description: Raw node-level block and transaction data.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Raw Data
  properties:
  - type: OpenAPI
    url: openapi/blockchair-raw-data-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-stats-api
  name: Blockchair Stats API
  description: Network and chain statistics.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/blockchair-stats-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
- aid: blockchair:blockchair-transaction-dashboards-api
  name: Blockchair Transaction Dashboards API
  description: Parsed transaction dashboards.
  humanURL: https://blockchair.com/api/docs
  baseURL: https://api.blockchair.com
  tags:
  - Transaction Dashboards
  properties:
  - type: OpenAPI
    url: openapi/blockchair-transaction-dashboards-api-openapi.yml
  - type: Documentation
    url: https://blockchair.com/api/docs
  - type: APIReference
    url: https://github.com/Blockchair/Blockchair.Support/blob/master/API_DOCUMENTATION_EN.md
  - type: PostmanCollection
    url: collections/blockchair.postman_collection.json
  - type: OpenCollection
    url: collections/blockchair.opencollection.json
common:
- type: AgenticAccess
  url: agentic-access/blockchair-agentic-access.yml
- type: DomainSecurity
  url: security/blockchair-domain-security.yml
- type: Authentication
  url: authentication/blockchair-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Blockchair
- type: LinkedIn
  url: https://www.linkedin.com/company/blockchair
- type: Website
  url: https://blockchair.com
- type: Documentation
  url: https://blockchair.com/api/docs
- type: Plans
  url: plans/blockchair-plans-pricing.yml
- type: RateLimits
  url: rate-limits/blockchair-rate-limits.yml
- type: FinOps
  url: finops/blockchair-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Blockchair

Kin Score

APIs 7

Blockchair Address Dashboards API

Blockchair Block Dashboards API

Blockchair Broadcast API

Blockchair Outputs Database API

Blockchair Raw Data API

Blockchair Stats API

Blockchair Transaction Dashboards API

Open Collections 9

API Collection

Blockchair Address Dashboards API

Blockchair Address Dashboards Block Dashboards API

Blockchair Address Dashboards Broadcast API

Blockchair Address Dashboards Outputs Database API

Blockchair Address Dashboards Raw Data API

Blockchair Address Dashboards Stats API

Blockchair Address Dashboards Transaction Dashboards API

Blockchair API

Pricing Plans 1

Blockchair Plans Pricing

Rate Limits 1

Blockchair Rate Limits

FinOps 1

Blockchair Finops

Security Posture 2

Blockchair Authentication

Blockchair Domain Security

Agentic Access 1

Blockchair Agentic Access

Resources