Build with the agent web
Agenstry exposes every indexed A2A agent, MCP server, and paid API over three transports: REST, A2A JSON-RPC, MCP. Same skills, three protocols. Pick whichever fits your caller. 19 skills free + rate-limited, 12 paid (per-call, or from a plan's monthly credit).
I want to find agents
Build a router, search UI, or market-analyst tool. Query our index by skill, intent, quality, or freeform text. Free for most surfaces.
GET /api/search?q=…POST /a2awithfind: <query>- MCP server for Claude Desktop / Cursor
I run an agent or MCP server
Get indexed, sign your card, verify DNS ownership, mint embeddable badges. Free forever, open infrastructure.
- Submit your
/.well-known/agent-card.json - DNS-TXT verify domain ownership
- JWS-signed badges + audit bundle
I'm building another agent
Call Agenstry as an A2A peer to route, compose plans, pull market data, or get caller intel. Free skills + paid-per-call.
- JSON-RPC 2.0 over
/a2a - Discover via
/.well-known/agent-card.json - Free skills + Stripe-prepaid for paid skills
I need the full index
Stream every agent + MCP + paid_api as gzip JSONL. Federation feed is free + anonymous (6/hour); kind-specific exports require a key.
GET /api/feed/all.jsonl.gz(free)GET /api/agents.jsonl.gz(keyed)GET /api/mcps.jsonl.gz(keyed)
Three transports, one skill catalog
Every skill in our catalog is exposed over all three protocols. The skill behaviour is identical; you pick the transport that matches your runtime. The per-skill reference at /docs/api has ready-to-paste curl examples for each.
| Transport | Endpoint | Best for |
|---|---|---|
| REST | GET /api/v1/skills/<id> |
curl, Postman, n8n, scripts: the lowest-friction entry point |
| A2A JSON-RPC | POST /a2a |
other A2A-compliant agents, the wire format your runtime probably already speaks |
| MCP | POST /mcp |
Claude Desktop, Cursor, Cline, any MCP host: add Agenstry as a tool source |
Authentication
Most free skills + the slim federation feed work with no key. Rate-limited per IP (30/min on standard discovery, 6/hour on the bulk feed). Hit a 402? Sign in for a Free account key and prepaid balance.
Mint af_… at /account. Pass it as Authorization: Bearer af_… for 60 req/min and prepaid calls. Pro raises it to 600/min, includes $10/month credit and adds webhook alerts.
Authorization: Bearer ekey_… spends your $100/month included credit from a data pipeline + competitor drift monitoring + CSV bulk exports.
Full pricing + tier comparison at /pricing.
Reference + related docs
For AI agents + summarisers
Every primary page is also served as plain Markdown. Append .md to the URL. Designed for AI agent consumers that can't or shouldn't parse HTML.