bots.st/kya-brasil
kya-brasil
Brazilian company/person credential verification and signed
3126 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 15
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://kya-br-agents.marcelfons.workers.dev/mcp
What it can do
| Tool | What it says it does |
|---|---|
kya_about | Free. What KYA Brasil is, how the credential flow works, prices, and where the schemas and signing keys are. |
kya_check_action | Signed verdict: is this action (action, amount, currency, counterparty, payment instrument) inside the agent's mandate and is the credential active? Evaluates the reserved mandate fields; lists the fields it did not evaluate. |
kya_company_agents | Free, company only. Every credential ever registered for your CNPJ, any status, whoever held the certificate (an accountant, another employee). Request signed with your e-CNPJ over "KYA Brasil: agents <cnpj>" + "at: <ISO time>". |
kya_company_webhook | Free, company only. Sets the https URL that receives signed events about your agents: credential issued, renewed, suspended, reinstated, revoked. Request signed with your e-CNPJ; url "-" removes it. |
kya_person_agents | Free, person only: every live credential behind your e-CPF and every CPF check made against each one. Sign "KYA Brasil: my agents\nat: <ISO time>" with the e-CPF (valid 10 minutes). |
kya_principal_match | Signed answer ($0.01) for a person's agent (principal.kind person): does the CPF you already have match the e-CPF holder behind it? On a match, a subject_ref of your own for that person (stable for you, different for every verifier). The CPF is never stored, published or revealed; 3 non-matching… |
kya_prove | Free. Send both signatures of the challenge. The e-CNPJ chain is validated against ICP-Brasil roots, the CNPJ must match, the certificate must not be revoked (CRL) and the company must be ATIVA; then the credential is issued (90 days, Ed25519-signed). |
kya_register | Register an AI agent for a Brazilian company: agent key (EVM address or Web Bot Auth Ed25519 key), CNPJ and a mandate (JSON, validated against /.well-known/kya-mandate.schema.json). Returns a one-time challenge the agent signs with its key and the company signs with its e-CNPJ (CMS/PKCS#7). Price… |
kya_renew | Re-issue the credential for 90 more days. The company signs the renewal challenge with an e-CNPJ in force (not revoked); the company must still be ATIVA at the Receita. |
kya_renew_prove | Free. Second step of kya_renew: send both signatures of the renewal challenge; the credential is re-issued for 90 days if the e-CNPJ is not revoked and the company is still ATIVA. |
kya_revocations | Free. Credentials revoked since a date (default: last 30 days), for verifiers that cache credentials. |
kya_revoke | Free. The company revokes the credential at once (e-CNPJ-signed request). Revocations are listed at /v1/revocations. |
kya_sign_link | Free. Link for whoever holds the company's e-CNPJ (owner, accountant): give challenge_id and the agent's signature, get the /sign URL. They see agent, company and mandate and sign in the browser (A1 .pfx) or with any ICP-Brasil signer (A3 token, cloud), or run kya-sign (npm… |
kya_verify | Free (50/day per IP). The agent's current credential: principal company, mandate, status (active, suspended, revoked, expired) and signature. Also by key: /v1/agents/by-key?kind=&id=. |
kya_verify_paid | Same as the free verification, without daily limit, plus a signed receipt of the verification itself (what was checked, when). Pay per call with x402. |
In its maker's words
KYA backed by a real company: e-CNPJ-signed agent mandates, revocation-checked, signed verdicts
- Website
- kya-br-agents.marcelfons.workers.dev
- Publisher
- celfons (2 listings in the registry)
- Listed from
- the official MCP Registry as
io.github.celfons/kya-brasil - Version
- 0.4.1, updated 13 Oct 2026
- Kinds of work
- Law, tax and government, Security and trust, AI models and agent tools
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 3126 ms | |
| Answered | 3949 ms | |
| Answered | 2779 ms |
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