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Block API

by Block Free tier

Bitcoin Payment, Wallet & Transaction Data

finance

Quick Reference

Base URL https://block.io Auth type API Key Header Auth header Authorization: Bearer YOUR_TOKEN Rate limit Not officially published Pricing Enterprise / contact sales Free quota None Documentation https://block.io/docs/basic Endpoint status Server online — HTTP 403 — server is online but path returned an error (may require auth)1.81s (checked Mar 29, 2026) Builder score D 23% builder-friendly
Pricing
28
Latency
30
Depth
14

Authentication

See documentation for auth details

Authorization: Bearer YOUR_TOKEN

Pricing

Model subscription Starting price Enterprise / contact sales Free quota None

Free with Block (formerly Square) developer account. Transaction fees apply; API access is free.

Key Endpoints

MethodPathDescription
GET / See documentation for endpoint reference

Sample Request

curl 'https://block.io'

Sample Response

{}

Data sourced from API Map. Always verify pricing and rate limits against the official Block documentation.