Public API Finder

Find free/public APIs for agents, prototypes, demos, and integrations.

Powered by multiple sources plus a curated best-known API layer:

• public-api-lists/public-api-lists for fast curated JSON discovery
• public-apis/public-apis for the larger canonical README list
• APIs-guru/openapi-directory for OpenAPI-backed APIs

Quick start

npx --yes --package=public-api-finder -- public-api-finder "weather forecast" --no-auth --https
npx --yes --package=public-api-finder -- public-api-finder "crypto prices" --category Cryptocurrency --limit 5
npx --yes --package=public-api-finder -- public-api-finder "jobs" --json
npx --yes --package=public-api-finder -- public-api-finder "payments" --openapi

Why

Agents often waste time wandering the web for APIs. This gives them a small, predictable first stop: search a curated list, filter by auth/HTTPS/CORS, then verify the chosen API docs before coding.

Skill

The package includes an agent skill at:

skills/public-api-finder/SKILL.md

The skill tells agents to prefer the CLI first, then live-check docs/endpoints before building.

CLI options

--category <name>  Filter by category substring
--source <name>    Filter by source: public-api-lists, public-apis, apis-guru, curated
--no-auth          Only APIs with Auth = No
--https            Only HTTPS APIs
--cors <value>     Filter by CORS: Yes, No, Unknown
--openapi          Only APIs with OpenAPI specs
--limit <n>        Max results
--json             Emit JSON
--refresh          Refresh cache