API Reference¶

These pages are a curated reference for filtering, ordering, and pagination on Tango's highest-traffic endpoints, with copy/pasteable examples (including SDK usage).

Swagger is still the canonical surface-area reference, but these pages aim to be faster to use day-to-day.

• Swagger (OpenAPI): https://tango.dev/api/
• For field definitions, see the Data Dictionary.

Awards¶

Definitive contracts, indefinite-delivery vehicles, other transactions, subawards, and solicitation-level groupings.

• Contracts — Definitive contract awards. Response shaping →
• IDVs — Indefinite delivery vehicles (GWACs, IDIQs, etc.). Response shaping →
• OTAs — Other Transaction Agreements from FPDS. Response shaping →
• OTIDVs — Other Transaction IDVs from FPDS. Response shaping →
• Subawards — Sub-contracts and sub-grants under prime awards. Response shaping →
• Vehicles — Solicitation-centric grouping of IDVs. Response shaping →
• GSA eLibrary contracts — Persisted GSA eLibrary contract metadata (direct endpoint).

Entities¶

• Entities — Vendors and recipients in federal contracting and assistance; UEI is the canonical identifier (from SAM.gov). Response shaping →
• Exclusions — SAM.gov exclusions (debarments, suspensions); ?active=true for records in force today. Data dictionary →

DIBBS¶

• DIBBS — DLA Internet Bid Board System: requests for quote, solicitations (RFP/IFB), and awards from the Defense Logistics Agency. Data dictionary →

SBIR/STTR¶

• SBIR/STTR — SBIR/STTR topics across every participating agency plus the DoD DSIP solicitation cycles behind them. Data dictionary →

State & Local — Beta¶

• State & Local — State, local and education (SLED) solicitations and planned procurements from individual government portals, with a per-state coverage endpoint. Does not join to the federal data: no UEI, no PIID, no NAICS/PSC crosswalk. Data dictionary →

eBuy¶

• eBuy — GSA eBuy requests (RFQs, RFPs, RFIs), scoped to the requests posted under your own Schedule contracts, with attachment text search and downloads. Available on paid plans by arrangement: requires a contract link from MakeGov. Response shaping → · Data dictionary →

Forecasts¶

• Forecasts — Upcoming procurement opportunities from agency feeds (e.g., HHS, DHS) before they appear as SAM.gov solicitations. Response shaping →

Grants¶

• Grants — Grant opportunities from Grants.gov (funding opportunities, not assistance transactions). Response shaping →

Budget — Beta¶

• Budget — Federal-account budget data (requested → enacted → apportioned → obligated → outlayed) joined to FPDS contract activity. Includes /recipients/ and /quarters/ drill-downs and the entity /budget-flows/ action. Data dictionary → · Exploration guide →

IT Dashboard¶

• IT Dashboard — Federal IT investment data from itdashboard.gov, keyed by Unique Investment Identifier (UII). Some filters are tier-gated; all shape expansions are available on every plan (only the business_case_html leaf is gated). Response shaping →

Protests¶

• Protests — Bid protest decisions (GAO and SBA OHA) from 2015 onward, with subordinate dockets available via ?shape=...,dockets(...). Requires authentication. Response shaping → · Data dictionary →

Contract appeals¶

• Contract appeals — Contract Disputes Act decisions of the Civilian Board of Contract Appeals (CBCA, 2007 onward) and the Armed Services Board of Contract Appeals (ASBCA, 2010 onward). Disputes under a contract already awarded, not bid protests. Free on every plan; only the decision_text field is gated. Response shaping → · Data dictionary →

Federal Register¶

• Federal Register — Every rule, proposed rule, notice and presidential document published in the Federal Register since 1994, filterable by CFR citation, agency, RIN, type, dates and open comment period. Free on every plan, including the full text. Response shaping → · Data dictionary →

Opportunities¶

SAM.gov contract opportunity and notice data.

• Opportunities — Contract opportunities aggregated by parent. Response shaping →
• Notices — Individual SAM.gov notice records (amendments, updates) under an opportunity. Response shaping →

Metrics¶

• Metrics — Time-series obligation and award-count metrics for entities, NAICS codes, and PSC codes (same URL pattern and query params for all).

Reference data¶

Lookup tables and codes used across awards and entities.

• Assistance listings (CFDA) — CFDA program numbers and titles for federal grants/assistance. Response shaping →
• Business types — SAM.gov business type codes (e.g., small business, 8(a), HUBZone). Response shaping →
• MAS SINs — MAS Special Item Numbers (SINs) reference data. Response shaping →
• NAICS — North American Industry Classification System codes. Response shaping →
• Organizations — Unified federal hierarchy (departments, agencies, offices in one tree with search and obligations). Response shaping →
• PSC — Product/Service Codes for federal contracting. Response shaping →

Shared¶

Objects and legacy endpoints shared across multiple resources. These data structures appear in response shaping expands on many endpoints (e.g., awarding_office(...), department(...), set_aside(...)).

• Shared response objects — Common expanded objects (set-aside, office) returned across endpoints.
• Agencies (deprecated) — Federal agencies (legacy endpoint; use Organizations instead). Response shaping →
• Departments (deprecated) — Top-level federal departments (legacy endpoint; use Organizations instead). Response shaping →
• Offices (deprecated) — Sub-agency offices (legacy endpoint; use Organizations instead). Response shaping →
• Set-aside codes — Set-aside type codes and descriptions.