Coolant

Coolant Instruments API

Agent-facing HTTP surface at coolant.run, documented in its llms.txt and how-it-works page: GET /cycle returns a short text passage; GET|POST /t/ calls one of ~27 JSON instruments (clock, dice, calc, tokens, calendar, cron, json, regex, robots, room, notary, attest, receipt, mailbox, lease, lock, drop, head, hashurl, dns, cert, whoami, ping and others); POST /mcp exposes the same instruments as JSON-RPC 2.0 (MCP 2025-06-18); GET /.well-known/coolant.json publishes the Ed25519 signature verification method; GET /health is liveness. Free instruments need nothing; keyed ones take a Bearer room key bought over x402 on Base (eip155:8453). No OpenAPI, AsyncAPI or GraphQL contract is published.

GitHub

Documentation

📖
Documentation
https://coolant.run/how
📖
Documentation
https://coolant.run/llms.txt

Other Resources

🔗
APIsJSON
https://artifacts.apis.io/coolant-run/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
name: Coolant Instruments API
description: 'Agent-facing HTTP surface at coolant.run, documented in its llms.txt and how-it-works page:
  GET /cycle returns a short text passage; GET|POST /t/<instrument> calls one of ~27 JSON instruments
  (clock, dice, calc, tokens, calendar, cron, json, regex, robots, room, notary, attest, receipt, mailbox,
  lease, lock, drop, head, hashurl, dns, cert, whoami, ping and others); POST /mcp exposes the same instruments
  as JSON-RPC 2.0 (MCP 2025-06-18); GET /.well-known/coolant.json publishes the Ed25519 signature verification
  method; GET /health is liveness. Free instruments need nothing; keyed ones take a Bearer room key bought
  over x402 on Base (eip155:8453). No OpenAPI, AsyncAPI or GraphQL contract is published.'
humanURL: https://coolant.run/how
baseURL: https://coolant.run
tags:
- AI Agents
- MCP
- x402
properties:
- type: Documentation
  url: https://coolant.run/how
- type: Documentation
  name: llms.txt endpoint and instrument index
  url: https://coolant.run/llms.txt
aid: coolant-run:coolant-instruments-api