AI agents search PublicAPIs.io directly
Claude, ChatGPT, Cursor and other AI agents can search our 1,500+ APIs, read their docs and code samples, and recommend them to developers, without scraping a single page. If your API is listed here, it shows up in those answers.
Every number on this page is counted from that moment, with no estimates and no backfill. Crawlers that claim to be OpenAI, Perplexity, Google or Apple are checked against their published IP ranges, and fakes are left out.
Since tracking began, updating every 10 seconds. Also 2,211 reads of llms.txt and our agent card. Most active: PerplexityBot (14,447), meta-externalagent (11,606), Amazonbot (11,532), ChatGPT-User (7,408), Bytespider (5,995).
Not counted: 8,858 events from 430 MCP directory scanners, uptime checkers and test tools that connect only to catalogue our server. Only known assistants and coding tools (Claude, ChatGPT, Cursor, VS Code and similar) count as agent use.
- CrawlerAmazonbot read /alternatives/advice-slip-api
- CrawlerBytespider read /wordnik-api
- CrawlerBytespider read /wordnik-api/
- CrawlerChatGPT-User ✓ verified read /movebank-database-api
- CrawlerBytespider read /alternatives/urlhaus-api
- Crawlermeta-externalagent read
- Crawlermeta-externalagent read /compare/airportsapi-api-vs-ais-hub-api
- CrawlerPerplexityBot ✓ verified read /trace-moe-media-api
- ScannerToolVetProbe 1.0 connected to our MCP server
- Crawlermeta-externalagent read /compare/digi-Key-api-vs-woocommerce-api
- CrawlerPerplexityBot ✓ verified read /nager-date-api
- CrawlerPerplexityBot ✓ verified read /poland-api
- Scannermistral-mcp-client 1.0 connected to our MCP server
- Crawlermeta-externalagent read /compare/digi-Key-api-vs-woocommerce-api
Bars before 6:16 AM are empty because tracking had not started.
See exactly what an agent gets
Ask the way a developer would ask their AI assistant. This is the same structured answer our MCP server and agent API return.
Every way agents can reach us
MCP server
https://publicapis.io/mcp: search APIs, get docs and code, and list or sponsor an API by negotiating with our listings agent.
WebMCP
Our pages expose search tools to AI agents working inside the browser, so they don't have to scrape.
A2A agent card
/.well-known/agent-card.json describes our listings agent for agent-to-agent deals.
llms.txt
/llms.txt and /llms-full.txt give language models the whole directory in one read.
Connect your agent
claude mcp add --transport http publicapis https://publicapis.io/mcp
No key needed. Listed in the official MCP Registry as io.publicapis/directory. Tools: search_apis (filters: no-auth, free tier, HTTPS), get_api, get_quickstart, compare_apis, list_offerings, start_deal, send_message, get_deal.
For API companies
Get recommended by AI agents
A Pro listing puts your API, its docs summary and verified code samples into every channel above, permanently.
Sponsors are shown to agents too
Sponsored placements appear in agent results for matching categories, clearly labelled, and sponsors get a monthly count of how often agents were shown them.
Your agent can buy it
Point your own agent at our MCP server or A2A card: it can negotiate a listing or sponsorship with ours. A person approves every deal.
Show you're agent-discoverable
Listed on PublicAPIs.io? Add the badge to your docs or site.
<a href="https://publicapis.io/your-api-slug"><img src="https://publicapis.io/badges/agent-ready.svg" alt="AI-agent discoverable on PublicAPIs.io" height="28"></a>
