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

41.2/100 thin ▬ flat Agent 48/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessFreemiumOpen⚡ Free to try

7 APIs

BlockchainCryptocurrencyExplorerBitcoinEthereumOn-Chain Data

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 41.2/100 · thin

Contract Quality 14.6 / 25

Developer Ergonomics 3.9 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 48/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 15 / 15

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

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: '0.19'
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 1

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