# Mexico RFC Validator with SAT 69-B EFOS Lookup

> Mexico RFC Validator with SAT 69-B EFOS Lookup is a paid API for AI agents from mexico-agent-toolkit.spain-agent-toolkit.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Validates a Mexican RFC number offline and checks if the entity appears on the SAT 69-B (EFOS) tax offender list

## Facts

- Endpoint: GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/rfc/validate?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mexico-rfc-validator-with-sat-69-b-efos-lookup-9877dbf1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o9Sivm5PvkfpW6S5Xt-IX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mexico-rfc-validator-with-sat-69-b-efos-lookup-9877dbf1
```

Example prompt: Can you validate the RFC 'EKU9003173C9' for me and let me know if it's a valid format, whether it's for a company or individual, and if it appears on Mexico's SAT 69-B tax offender list?

## When to prefer this

Use this endpoint when you need to validate Mexican RFC numbers without setting up an account or obtaining API keys — ideal for pay-per-call agent workflows. It is the right choice when you need both offline RFC structural validation and a real-time SAT 69-B EFOS compliance check in a single call. Prefer this over manual lookups or scraping the SAT portal when building automated supplier onboarding, invoice verification, or KYC pipelines for Mexican entities.

## Known failure modes

- Missing or malformed RFC query parameter returns an error
- RFC shorter or longer than 12-13 characters will fail format check
- Homoclave errors cause checkDigit check to fail
- EFOS data may be stale relative to the stated cutoff if the service hasn't updated
- Non-Mexican tax IDs will return invalid
- Payment failure via x402 protocol blocks access to the endpoint

## How this service works

Pay-per-call Mexico utilities for AI agents over x402 (USDC on Base). No accounts, no API keys. Mexican RFC validation (offline) and SAT 69-B (EFOS) lookup by RFC. Data: SAT, Listado completo 69-B, datos abiertos (Libre Uso MX), cut-off 2026-09-30. Not an official SAT service and not endorsed by the SAT. / No es un servicio oficial del SAT ni está avalado por el SAT. Privacy notice: /privacy

## Output

Returns a JSON object with: the RFC type (persona_moral for 12-char or persona_física for 13-char), overall validity boolean, individual check results (format, date, checkDigit), the normalized RFC string, and SAT 69-B listing status including whether they are listed, their EFOS situation if listed, and the data cutoff date (2026-09-30).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "rfc"
     ],
     "properties": {
      "rfc": {
       "type": "string",
       "description": "RFC, 12 (persona moral) or 13 (persona física) characters"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "type": "persona_moral",
  "valid": true,
  "checks": {
   "date": true,
   "format": true,
   "checkDigit": true
  },
  "sat69b": {
   "listed": false,
   "situation": null,
   "dataCutoff": "2026-09-30"
  },
  "normalized": "EKU9003173C9"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mexico-rfc-validator-with-sat-69-b-efos-lookup-9877dbf1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mexico-agent-toolkit.spain-agent-toolkit.workers.dev](https://www.zero.xyz/host/mexico-agent-toolkit.spain-agent-toolkit.workers.dev/llms.txt)