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FiscalAPI (BYOK)

Read your FiscalAPI (Mexico CFDI 4.0 e-invoicing) stamp balance movements, events, products, Auto CFDI consumption and SAT catalogs with your own API key and tenant

Unify Dynamics LLC

Tools8read-only
Sign-inBYOKbring your own key
Key keptNeverused for one call only
PriceFreeoptional Pro limits
ProviderFiscalAPIunofficial, not affiliated
Works withMCP · RESTany agent

Try asking

Real questions, and the tools your agent calls to answer them.

Which SAT catalogs can I search in FiscalAPI?
Tools called
list_catalogs
What is the SAT payment form code for debit card?
Tools called
search_catalog
Which SAT validations does FiscalAPI support?
Tools called
list_sat_validation_types
How many stamps have I bought and used recently on FiscalAPI?
Tools called
list_stamp_movements
Show FiscalAPI stamp movement 77678d6d-94b1-4635-aa91-15cdd7423aab
Tools called
get_stamp_movement
What events happened on my FiscalAPI account this week?
Tools called
list_events

About

FiscalAPI (BYOK) lets an AI assistant read your own FiscalAPI data through the FiscalAPI API with a key you supply (FiscalAPI API key). Read-only: 8 tools (list_catalogs, search_catalog, list_sat_validation_types, list_stamp_movements, get_stamp_movement, list_events, list_products, get_auto_invoice_consumption). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to live.fiscalapi.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by FiscalAPI. FiscalAPI and its logos are trademarks of their owners and are used only to say which service the connector works with.

Sources: Live from the FiscalAPI API (live.fiscalapi.com) with a BYOK key; documentation: https://docs.fiscalapi.com/llms.txt. Endpoints checked against that documentation on 2026-10-16.

Privacy

The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.

Data not collectedNo account, no profile, no stored prompts or results.

What it can do

8 tools, grouped by job. Every one is read-only or compute-only.

OpenAPI
Read your data8 tools
  • List catalogsList the names of the SAT and internal catalogs (payment forms, tax regimes, CFDI uses, units, product codes and more) that search_catalog accepts.
  • Search catalogSearch one SAT catalog by a term and return the matching ids and descriptions, for example the payment form or tax regime code for a name.
  • List sat validation typesList the SAT validation checks FiscalAPI offers for a CFDI (XML structure, certificate validity, seals, SAT status, blacklist 69-B) with what each…
  • List stamp movementsList movements of invoice stamps (timbres) between accounts with amount, type, status, reference and date, showing your stamp balance history.
  • Get stamp movementGet one stamp movement by id.
  • List eventsList account events of the last 30 days (for example invoice.canceled) with type, related object and status change, newest first.
  • List productsList the products and services saved on the account with price, SAT unit, SAT product code and tax rates.
  • Get auto invoice consumptionReport Auto CFDI usage for a date range: tickets by status per issuer and ticket credits consumed, with totals.

Information

PublisherUnify Dynamics LLC
CategoryMoney & business
LanguagesEnglish
Built forMexico
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpointhttps://byok-fiscalapi.connectorbay.com/mcp
REST APIopenapi.json
SupportGet help · Status
CountryMexico
FunctionOther
LayerDeep connectors

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Get FiscalAPI (BYOK)

Free · BYOK · Read-only

BYOK: bring your own keyThis connector uses your own FiscalAPI FiscalAPI API key. Create one at https://docs.fiscalapi.com/credentials-info, with the fewest permissions it needs (read-only if the provider offers it). Your assistant sends it in the X-Upstream-Key header with every request. It is used for that one call only: never stored, logged or cached, and only ever sent to FiscalAPI. Revoke it at the provider whenever you like. Unofficial connector: not affiliated with FiscalAPI.