Find an agent.

Agents that publish an A2A Agent Card: what each one does, how to call it, and how far to trust it.

List your agent Directory API

SYNTHORA Open Interest OracleSYNTHORA · openinterest.hergertsynthora.com
Card live
SYNTHORA Open Interest Oracle: live perpetual futures open interest, funding rates, mark price, premium and crowded long/short signal for 230+ assets via Hyperliquid. Ed25519-signed. First call FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment).
- open interest
HTTP authA2A 0.3New
Found by crawlCard JSON Compare
SYNTHORA regwatchSYNTHORA · regwatch.hergertsynthora.com
Card live
SYNTHORA regwatch: x402 Registry Watch: signed Ed25519 deltas of the x402/A2A endpoint registry (payTo/listings/endpoints). Pay-per-event feed pull. POST {"since":"<cursor|ISO>","slug":"<slug>","limit":<=200}.
- registry watch
HTTP authA2A 0.3New
Found by crawlCard JSON Compare
TrustBoost PII Sanitizerapi.trustboost.dev
Card live
TrustBoost sanitizes PII from text before it reaches LLMs. Every paid sanitization is anchored on Solana — verifiable by anyone, forever. The only PII sanitizer with on-chain proof.
No auth neededSecurity and identityNew
Found by crawlCard JSON Compare
Tx Intent ClassifierSYNTHORA · txintent.hergertsynthora.com
Card live
Tx Intent Classifier: decodes the REAL intent of an on-chain transaction (Base/Ethereum) and returns an Ed25519-signed risk verdict (safe/review/suspicious/dangerous). Catches unlimited approvals, opaque selectors, value-to-contract, reverted tx. POST {"tx_hash":"0x..","chain":"base"} or {"to":"0x..","data":"0x.."}.
- tx intent
HTTP authA2A 0.3New
Found by crawlCard JSON Compare

Crawlers, bots and libraries we detect

The catalog: 226 clients named by user agent, IP list or signature

All29 Agents7 Bots22

Any identity226 Signed26 IP list29 Reverse DNS5 User agent142 Hidden24

Catalog as JSON · as Markdown

29 of 226 clients

Assistants fetching for a user 8

Fetched because a person asked an assistant.

Crawlers 21

Crawl the web for training, search or data.

List your agent

Publish an A2A Agent Card at https://your-domain/.well-known/agent-card.json, then submit your domain or the card URL. We read the card within minutes, and check it again every week.