Live Updated 2026-08-20 09:52 UTC
The verified index of the agent economy
We crawl agentic endpoints and then independently probe them. What you see here is what we measured — not what publishers claim.
The brief
Where the index stands today
What nobody else shows
The verification gap
Directories list what publishers say. We probed every domain that declares an MCP server and recorded what actually answered. Of 8,935 declared endpoints:
- Confirmed live3,71241.5%Answered a real JSON-RPC initialize handshake
- Claimed, did not answer3,35737.6%Listed as MCP but returned no valid handshake
- Robots-blocked1,23213.8%We honour robots.txt and did not probe these
- Unreachable6337.1%DNS or connection failure at probe time
Coverage
Endpoint domains by protocol
Counted from live protocol detection and authoritative registries. A domain can speak more than one protocol.
Composition
Largest resource types
Writing
Latest from the index
Guides for people building with agents, and a daily read on the agent economy. Both draw on what we measure.
- Agents Got Write Access. The Undo Button Is Still Missing.
Codex deleted files nobody asked it to touch. Alongside AI-built exploits and agent-run protein design, irreversible capability is outpacing containme
- How to Use MCP Servers (And How to Tell Which Ones Actually Work)
Connect an MCP server to Claude, VS Code or any client, verify it actually runs, and choose servers that are still alive. With measured data on regist
- The Revenue Is Real. So Is the Chaos.
Anthropic revenue tops $65B as developers pay 4.4x per-token rates, while new research shows agents collude and drop instructions. What to check in yo
- How to Give Your AI Agent a Wallet (And What It Can Buy for a Cent)
A practical guide to giving an AI agent its own wallet with x402 and USDC on Base, plus what it can actually buy: 44% of measured paid endpoints cost
Browse
Browse by protocol
Every resource carries the protocols we detected on it. Pick one to filter the index.
Or explore everything — filter by protocol or category, then open any agent for its live tool list.
Latest
Recently indexed hosts
Newest first, one entry per host. The description is the operator’s own where we could read it, and marked otherwise.
- ScryApplication/vnd.oai.openapi+json;version=3.1 · 4 listed
scry.solanahub.deSolana wallet intelligence via x402 for agents: 64,434 indexed wallets, 14,553 funding-lineage caches, 421 resolved X-handles, no API keys, no subscriptions.
x402 api.utilia.inkGive a Solana agent live compute-unit price bids for $0.002 per call via x402 USDC. One AgentCash command, no API key or subscription.
- ScrywardA2A agent · 10 listed
scry.moreright.xyzThe store: a curated, open-source-required game platform. Agents build the games through the board and get paid in SCRY; humans and agents play them; every listing carries the same on-chain …
x402 - Viridis Agent FleetMCP server · 32 listed
mcp.viridisconservation.comEnergy and climate compliance regulation scan across a curated 14-regulation database, with jurisdiction, urgency, and effective-date signals, including California SB 253 and SB 261 status. …
A2Asummarised by us - Relaystation — Pay-per-call storage and trust for agents and develope…MCP server · 7 listed
api.relaystation.aiBaton is pay-per-call storage, handoff, and cryptographic proof on Relaystation. An agent signs one USDC payment and gets a result — no account required — or a developer signs in, tops up, a…
MCPx402 - Agent ReadyMCP server · 9 listed
agent-ready.devScore any website against the Vercel Agent Readability Spec and llmstxt.org standard. Get actionable fixes to make your site AI-agent friendly.
MCP - 2sOpenAPI service · 115 listed
2s.ioThe (most) everything API: 575+ pay-per-call endpoints for AI agents — ground-truth data, a full AI gateway, and agent infrastructure (storage, queues, watchers). USDC via x402, no signup, n…
- Hugging Face – The AI community building the future.AI registry · 2 listed
huggingface.coWe’re on a journey to advance and democratize artificial intelligence through open source and open science.
- Hugging Face Discover RegistrySkill · 220 listed
huggingface-hf-discover.hf.spaceSearch indexed Hugging Face Skills, Space skills and MCP-enabled Spaces.
summarised by us
About the data
Methodology
Every figure here is recomputable from /data.json — free, no key, CORS-open.
Fields are labelled by provenance: measured (we probed it) vs self-reported (the publisher said so).
Caveats we will not bury. Resource counts are concentration-skewed — a few hosts bulk-list thousands of endpoints, so totals overstate ecosystem breadth.
We honour robots.txt, which is why 1,232 domains are counted but unprobed.
For machines
Paid API · x402 on base
No accounts, no keys, no invoices. Call an endpoint, get a 402 with payment requirements, retry with an X-PAYMENT header, get served.
What agents pay
GET /searchRanked capability search$0.005GET /agent/:idFull profile: catalog, tools, trust provenance, liveness$0.01Free tier: /browse, /endpoints, /stats, /data.json.