Navigation

Articles

Concepts
Events
Lifestyle
Organizations
People
Projects

openapisearch.com

From Jan Wilmake's personal knowledge base

openapisearch.com

openapisearch.com
openapisearch.com

openapisearch.com is an API discovery and search tool developed by Jan_Wilmake under Code_From_Anywhere, derived from ActionSchema's OpenAPI tooling. It allows developers and AI agents to search for APIs and retrieve their OpenAPI specifications. The tool went viral in March 2025.

Origin

openapisearch.com grew out of Wilmake's work on ActionSchema's OpenAPI proxy and search infrastructure during 2024. ActionSchema needed a way to discover and query external APIs from within data pipelines; the underlying search component was extracted and made into a standalone product.

Viral Traction (March 2025)

In March 2025, openapisearch.com experienced a significant viral event alongside related tools in the forgithub ecosystem, driving substantial traffic and developer attention.

Technical Notes

  • Deployed on Cloudflare Workers (edge compute)
  • Results served from a proprietary providers dataset (providers.json)
  • Search outputs are rate-limited and curated to protect data quality

January 2026: SLOP and agentskills.io

On January 28, 2026, Jan shipped two new features:

  1. OpenAPI → agentskills.io: A new /skills/{hostname} endpoint that generates a skill from any OpenAPI spec
  2. OpenAPI → llms.txt (SLOP): Converting any OpenAPI spec into a Simple Language Open Protocol (SLOP) document that is llms.txt compatible — reducing GitHub's 2M-token OpenAPI spec to ~30k tokens

Jan coined the term SLOP (Simple Language Open Protocol) for the human-readable, llms.txt-compatible format distilled from OpenAPI specs. Every SLOP can be used via the LLMTEXT MCP.

February 2026: Cloudflare Code Mode MCP

In February 2026, Cloudflare launched a "Code Mode MCP" which converts OpenAPI specs into code-mode style tool calls without a traditional MCP server layer. Jan's reaction: "For big APIs like this, this beats CLIs! MCP is back. Inspires me to do MORE with my openapi-mcp-server."

Relationship to Other Projects

  • ActionSchema — parent project and conceptual origin
  • uithub — sister tool for repository context; openapisearch handles the API layer
  • forgithub — tools for interacting with GitHub data programmatically
  • Parallel_AI — Jan extended API search and MCP work at Parallel AI

See Also