Cámara de Diputados

The official compilation of Mexican federal legislation: 315+ laws and codes (including the Constitution, and recently abrogated laws flagged abrogated), 135+ reglamentos, and the chronological log of every reform decree. Four endpoints: two catalogs, one detail lookup, and the reform log.

Federal laws

POST /mx/diputados/federal-laws/v1

Field	Type	Notes
`query`	string	Optional name filter. Case- and accent-insensitive substring; also matches the abbreviation.
`page`	integer	1-based page number. 100 laws per page.

curl https://api.croma.run/mx/diputados/federal-laws/v1 \
  -H "Authorization: Bearer $CROMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "query": "instituciones de crédito" }'

Returns laws and pagination (total, page, page_size, total_pages).

Field	Notes
`id`	Law identifier (e.g. `lic`, `cpeum`). Pass it to the lookup below.
`name`, `abbreviation`	Full name and official short code, when the compilation uses one.
`publication_date`	Original DOF publication date.
`last_reform_date`	Date of the most recent reform; null when unreformed.
`last_reform_note`	Set when the latest listed event is judicial rather than a reform.
`status_note`	Legal-status annotations: invalidity declarations, pending abrogation, entry into force.
`abrogated`	`true` when the law is listed as abrogated (no longer in force).
`reformed`	Whether the law has ever been reformed.
`pdf_url`, `doc_url`	Current consolidated text.

One law

POST /mx/diputados/federal-law/v1

Field	Type	Notes
`law_id`	string	Required. The `id` from the catalog above.

curl https://api.croma.run/mx/diputados/federal-law/v1 \
  -H "Authorization: Bearer $CROMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "law_id": "lic" }'

Returns found, law_id, and law. The law carries every catalog field plus original_publication (dof_date and a scan of the original) and reforms: every decree that amended it, newest first, each with number, dof_date, description (the decree headline), pdf_url, doc_url, and any errata.

Federal regulations

POST /mx/diputados/federal-regulations/v1

Field	Type	Notes
`query`	string	Optional name filter. Case- and accent-insensitive substring.
`page`	integer	1-based page number. 50 per page.

curl https://api.croma.run/mx/diputados/federal-regulations/v1 \
  -H "Authorization: Bearer $CROMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "query": "ley aduanera" }'

Returns regulations and pagination. Each reglamento has name, abrogated, publication_date, pdf_url, doc_url, and an inline history of entries typed original, reform, amounts (the annual amount and fee updates), erratum, clarification, or validity (Fe de erratas, Aclaración, and Disposición de vigencia notices), each with its dof_date and doc_url.

Reforms by year

POST /mx/diputados/law-reforms/v1

Field	Type	Notes
`year`	string	Optional 4-digit year. Defaults to the current year. Archives verified from 2022.
`page`	integer	1-based page number. 50 decrees per page.

curl https://api.croma.run/mx/diputados/law-reforms/v1 \
  -H "Authorization: Bearer $CROMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "year": "2026" }'

Returns year, found (false when no reform log exists for that year), pagination, and decrees, newest first. There is one entry per DOF publication day, and a single day can bundle several instruments. Each entry has dof_date, summary (full decree prose, which can be long), actions, and affected_laws, since one decree can touch many laws. Canonical actions are reforman, adicionan, derogan, abrogan, expiden, modifican, actualizan, fe de erratas, and aclaración, plus sentencia for court entries that carry no decree verb.

Full reference

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Countries

Cámara de Diputados

Federal laws

One law

Federal regulations

Reforms by year

Full reference

​Federal laws

​One law

​Federal regulations

​Reforms by year

Full reference

Federal laws

One law

Federal regulations

Reforms by year