# Abierto

> US federal contract opportunities from SAM.gov, joined to the contract awards USAspending.gov recorded for them. 116,418 notices posted between 2026-06-19 and 2026-09-15, grouped into 75,826 opportunities; 9,005 open for responses right now (data rebuilt 2026-09-16T10:08:20.849384Z). 32,596 vendors and 2,965 buyer profiles. Public-domain source data; site content CC0. No account, no key.

## What an opportunity is

SAM.gov issues a new notice id for every revision. This site groups notices that share a solicitation number, and merges groups that USAspending links to the same award. One opportunity page lists every publication (sources sought, presolicitation, solicitation, amendments, award notice) and the award record when one was matched. Awards are matched on identifiers only: contract number (PIID) or solicitation number, never on names.

## URL grammar

  https://abierto.us/opportunities/{solicitation_number}   solicitation number, lowercase, letters and digits only (W91ZLK-26-Q-A017 → w91zlk26qa017)
  https://abierto.us/notices/{sam_notice_id}               redirects to the opportunity a SAM.gov notice id belongs to
  https://abierto.us/departments/{slug}-{cgac}             department or independent agency (3-digit CGAC, e.g. 036 for Veterans Affairs)
  https://abierto.us/agencies/{slug}-{fpds}                sub-agency (4-character FPDS sub-tier code, e.g. 3600)
  https://abierto.us/offices/{slug}-{aac}                  contracting office (6-character AAC, e.g. 36c262)
  https://abierto.us/vendors/{slug}-{uei}                  vendor by Unique Entity ID (12 characters)
  https://abierto.us/industries/{naics}                    NAICS code at any depth, 2 to 6 digits; sectors 31-33, 44-45, 48-49 as written
  https://abierto.us/psc/{code}                            product or service code, 1 to 4 characters
  https://abierto.us/set-asides/{code}                     sba, 8a, 8an, hzc, hzs, sdvosbc, sdvosbs, wosb, wosbss, edwosb, edwosbss, las, iee, isbee, biciv, vsa, vss
  https://abierto.us/states/{st}                           two-letter state, territory or military post (aa, ae, ap)
  https://abierto.us/search?q=                             keyword, solicitation number, agency or vendor; not indexed

The slug before the code is a courtesy; only the code resolves, and a stale slug redirects (308) to the current one.

## Formats

Every entity page above has two twins at the same URL plus a suffix: .md (Markdown) and .json (the record). Content negotiation works too: Accept: text/markdown or Accept: application/json on the page URL. Cite the HTML URL without the suffix; it is the canonical one and the twins say so in a Link header.

  https://abierto.us/feed.xml        Atom feed of the 100 newest opportunities
  https://abierto.us/sitemap.xml     sitemap index; shards of 5,000 URLs with real lastmod dates
  https://abierto.us/data            sources, coverage and limits, in prose

## Hubs

  https://abierto.us/opportunities   newest first; ?open=1 for open only; ?type=o|p|k|r|s|a|u ; ?setaside= ; ?state= ; ?dept= ; ?naics=
  https://abierto.us/agencies        departments with their sub-agencies
  https://abierto.us/offices         contracting offices, ?state=
  https://abierto.us/vendors         vendors by dollars obligated, /vendors/page/{n}
  https://abierto.us/industries      NAICS sectors and the most active industries
  https://abierto.us/psc             product and service code groups
  https://abierto.us/set-asides      small-business programs with counts
  https://abierto.us/states          places of performance
  https://abierto.us/glossary        definitions

## What the data does not contain

- Notices posted before 2026-06-19. The window rolls forward; older solicitations are on SAM.gov.
- Who is bidding. Offerors are never public before award. "Offers received" appears only on the award record, as a count.
- Attachments. They are listed and linked to SAM.gov's download endpoint, which needs no account; the files are not mirrored here.
- State, county, city or university procurement. Federal only.
- Lifetime vendor totals. Dollar figures are obligations recorded in the window; a contract ceiling is shown when the record carries it.
- Anything from the keyed SAM.gov API. Sources are the public bulk extracts and USAspending's bulk download.

A deadline shown here is the one in the extract at the last rebuild. Agencies amend deadlines. Confirm on SAM.gov before acting.

## Notice types

o Solicitation; p Presolicitation; k Combined synopsis and solicitation; r Sources sought; s Special notice; a Award notice; u Justification; g Sale of surplus property; i Consolidation or bundling.

## Sources

- SAM.gov Contract Opportunities bulk extract (active and archived): https://sam.gov/data-services/Contract%20Opportunities/datagov?privacy=Public
- USAspending.gov custom award data: https://www.usaspending.gov/download_center/custom_award_data
- Publisher: Global Tech Operations, LLC. Sister site for Mexico: https://licitia.com.mx/abierto