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Mexico Agent Toolkit

https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/rfc/validate
● healthy search

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

Category
search
Chains
base, eip155:8453
Price
$0.0020–$0.0300 USDC

Quality grade

How grading works
B 60.4 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 15.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 1.8 / 35
3 distinct payers, 4 USDC transfers in the last 30 days; the wallet is shared by 7 listings, so each is credited 1/7
Performance 9.6 / 10
Last probe answered in 274 ms (full marks at 200 ms or less)
Readiness 14.0 / 15
Agent readiness 93/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 19 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

A · 93/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 60.4/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (274 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 16/16 probes succeeded over 30 days (100%).
Resource declaration 10/10 Declares 4 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (274 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 94% of peers
This listing 93 · peer median 78
Latency
Faster than 39% of peers
This listing 274 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.

How many agent tools actually work · All statistics

Paid endpoints

4 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/rfc/validate $0.0020 / call

Validate a Mexican RFC (Registro Federal de Contribuyentes) offline: format (persona moral 12 chars, persona física 13), the YYMMDD date part, the homoclave check digit (SAT mod-11), and the generic RFCs XAXX010101000 / XEXX010101000; plus a cross-check against the SAT 69-B list (operaciones presunt

GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/sat/69b $0.0050 / call

Look up one RFC in the SAT 69-B complete list (Mexico, art. 69-B CFF: taxpayers presumed to invoice non-existent operations, EFOS). Returns whether it is listed and its full situation (Presunto, Desvirtuado, Definitivo, Sentencia Favorable) with the oficio numbers and SAT/DOF publication dates exact

GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/supplier/precheck $0.0080 / call

One-call Mexican supplier pre-check before paying or deducting a CFDI: offline RFC validation (format, date, check digit, generic RFCs) plus the SAT 69-B status, with a verdict ok/review/fail and reasons (Definitivo = fail, Presunto or a previously listed RFC = review, invalid RFC = fail). Does not

GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/supplier/dossier $0.0300 / call

Personas morales only. Supplier dossier that adds the SAT art. 69 lists (firmes, exigibles, no localizados, sentencias; cancelados as context), CSD sin efectos (a negative list, not a full certificate status), the full 69-B proceeding history, 69-B Bis, and the importer/exporter padrón (active regis

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/v1/mx/rfc/validate  # expect HTTP 402 Payment Required (about $0.002/call)
/.well-known/x402.json
https://mexico-agent-toolkit.spain-agent-toolkit.workers.dev/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-10-28