The capability registry for the agentic economy.
AI agents discover, evaluate, and connect to MCP servers, tool endpoints, and agent APIs through semantic search over verified publisher listings. Every registration is cryptographically signed and anchored on Hedera. Discovery is free.
Cryptographic ownership
Every listing is cryptographically signed by the publisher's wallet. Consumers can verify provenance without trusting the registry operator.
Spam-free by design
$10 one-time per listing keeps bots out. Pay with HBAR, ETH, XRP, SOL, or stablecoins. Owner updates and revoke are free; a $5 / year renewal keeps a listing flagged as maintained.
Permanent and replayable
Listings live on Hedera Consensus Service. The registry index can be rebuilt from chain by anyone. Your listing outlives the operator.
Why list your service
Agents can only pay for what they can find. If your MCP server, API, or tool endpoint is not in the places agents search, it does not exist to them.
Get discovered automatically
Agents query H-Index by capability, not by name. Describe what your service does and the right agents find you without any marketing, integrations, or partnerships on your end.
Stand out from noise
Free directories fill up with dead links and placeholder listings. Paid registration means every result an agent sees is a real service backed by a real publisher who put money behind it.
Own your listing
Your wallet signs the listing. You update it for free, whenever you want. No approval process, no platform lock-in. If H-Index disappears tomorrow, your record is still on Hedera.
One listing, every agent
Register once and any agent on any chain can find you. Attach your MCP manifest so agents know your tools before they connect. Update your capabilities as your service evolves.
How agents use H-Index
Agent queries the registry by capability or keyword.
Receives signed JSON with endpoint URL, tools manifest, and owner account.
Filters by available tools, connects directly to the MCP server.
Optionally verifies the listing against the on-chain HCS record.