Kya Brasil is answering right now. Last checked 13 min ago. It exposes 15 tools.
KYA backed by a real company: e-CNPJ-signed agent mandates, revocation-checked, signed verdicts
Uptime history
14 days of history
14 days agonow
100.0%
Uptime 24h
91 of 91 checks
15
Tools
read from the server
1563 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 35
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 13 October 2026. No other catalogue keeps this.
15 Oct
a tool changed version2 times that day
14 Oct
a tool changed version6 times that day
14 Oct
3 tools appeared
kya_person_agents, kya_principal_match, kya_sign_link
14 Oct
2 tools changed the parameters they ask for
kya_check_action, kya_register
14 Oct
a tool description was rewritten
kya_check_action
13 Oct
6 tools appeared
kya_act, kya_acts_export, kya_act_text and 3 more
13 Oct
5 tool descriptions were rewritten6 times that day
kya_prove, kya_register, kya_renew and 2 more
13 Oct
a tool changed version5 times that day
13 Oct
4 tools disappeared
kya_act, kya_acts_export, kya_act_text and 1 more
and 11 more, back to 13 October 2026
Tools have disappeared from this server
A tool that vanishes takes a piece of your agent with it, and the change arrives silently. Watch this server and every such change lands in your inbox.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.
run in your terminal
claude mcp add kya-brasil --transport http https://kya-br-agents.marcelfons.workers.dev/mcpSettings → Connectors → Add custom connector, then paste this address
https://kya-br-agents.marcelfons.workers.dev/mcp~/.codex/config.toml
[mcp_servers.kya-brasil]
url = "https://kya-br-agents.marcelfons.workers.dev/mcp".cursor/mcp.json
{
"mcpServers": {
"kya-brasil": {
"url": "https://kya-br-agents.marcelfons.workers.dev/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"kya-brasil": {
"type": "http",
"url": "https://kya-br-agents.marcelfons.workers.dev/mcp"
}
}
}Available tools 15
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
kya
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 answers per credential stop your checks. The person sees every check.
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 covers the checks at issuance.
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-brasil/agent-tools) with the link. The issuer never sees the certificate.
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.
Tools removed
Tools this server used to expose. Anything built against them stopped working on the day they went.
kya_act
removed 13 Oct 2026
kya_acts_export
removed 13 Oct 2026
kya_act_text
removed 13 Oct 2026
kya_register_act
removed 13 Oct 2026
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://kya-br-agents.marcelfons.workers.dev/mcp | streamable-http | answering | 1259 ms | 13 min ago |
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Kya Brasil — questions
Answers built from our own checks of this server.
What can Kya Brasil do?
It exposes 15 tools, read directly from the server on our last check. Among them: kya_about, kya_check_action, kya_company_agents, kya_company_webhook, kya_person_agents, kya_principal_match and 9 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Kya Brasil working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1563 ms. The bar chart above shows every period we have measured.
Did Kya Brasil ever remove tools?
Yes. kya_act, kya_acts_export, kya_act_text, kya_register_act are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.
How do I connect Kya Brasil?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Kya Brasil need an API key?
No. Kya Brasil completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 15 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Kya Brasil?
It answers our handshake in 1563 ms on average, which is faster than 1% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.