Third-party technical documentation describes publicly accessible routes to CAIXA lottery results, including Mega-Sena and Lotofácil, but the available evidence does not establish an official CAIXA OpenAPI specification or developer contract. Treat the routes and field names below as provisional, verify the live responses, and do not confuse the results service with SIGAP, a separate regulatory system for authorized betting operators.
What is publicly available?
CAIXA provides consumer-facing lottery results on its official results page. Its official lottery app page describes features including results, upcoming draws, estimated prizes, revenue information, and ticket checking. Those pages establish consumer services, not a supported developer API.
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A separate technical documentation page from SignedData describes an upstream service at https://servicebus2.caixa.gov.br/portaldeloterias/api, with routes and a sample Mega-Sena response. This is a third-party description, not a CAIXA-published OpenAPI contract. Use it to guide inspection rather than assume its paths or schema are guaranteed.
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The examples use a game name followed by a contest number:
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| Game | Example route |
|---|---|
| Mega-Sena | GET /portaldeloterias/api/megasena/{concurso} |
| Lotofácil | GET /portaldeloterias/api/lotofacil/{concurso} |
| Quina | GET /portaldeloterias/api/quina/{concurso} |
| Lotomania | GET /portaldeloterias/api/lotomania/{concurso} |
| Dupla Sena | GET /portaldeloterias/api/duplasena/{concurso} |
The documentation also describes a root route for the latest Mega-Sena draw. It does not establish equivalent latest-draw routes for every game. See SignedData’s CAIXA lottery documentation for its examples.
What data might a response contain?
The sample payload described by SignedData includes fields that could support a results display or draw-history lookup. These names and their types are third-party descriptions, so inspect current responses before relying on them:
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| Field | Described meaning |
|---|---|
concurso |
Contest number |
data_apuracao, data_apuracao_iso |
Draw date representations |
local_sorteio, cidade_uf |
Draw location and city/state |
dezenas, dezenas_ordem_sorteio |
Drawn numbers and numbers in draw order |
acumulado |
Whether the prize accumulated |
premiacoes |
Prize-tier information |
valor_arrecadado |
Amount collected |
valor_acumulado_proximo |
Amount accumulated for the next draw |
data_proximo_concurso |
Date of the next contest |
How should you draft an OpenAPI spec?
If you are documenting an application that consumes these routes, define the paths and contest-number parameter as provisional until verified. Use observed responses to build schemas for each game rather than assuming identical prize tiers or field behavior across them.
- Inspect current responses. Check a valid contest for each game you plan to support, then examine how dates, drawn numbers, prize tiers, and accumulated amounts are represented.
- Test boundary and failure cases. Observe what happens for a contest that cannot be found, an upstream failure, and a malformed or unexpected response. Document only behavior you have actually seen.
- Record the evidence in the spec. Describe confirmed paths, parameters, response fields, and observed errors. Mark unverified behavior as unknown rather than inventing guarantees.
- Keep operational assumptions out of the contract. The available documentation does not establish authentication requirements, rate limits, pagination, uptime commitments, or schema-stability terms for this endpoint.
What can developers build with the results?
CAIXA’s consumer pages and app describe result checking, upcoming draws, and ticket checking. Developer applications such as a results display, draw-history lookup, or result notification are reasonable proposed uses of the described data, but they should not be presented as CAIXA-endorsed integrations.
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For a production dependency, evaluate the source’s authority and provenance, the games covered, update timing, authentication, error behavior, schema stability, and terms of use. The available evidence does not settle all of those questions for the CAIXA service.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is SIGAP the same API?
No. SIGAP is a Ministry of Finance regulatory system for authorized betting operators, not the public lottery-results interface. Its documentation describes operator data submissions and checks, including checks related to people barred from betting. The Ministry describes SIGAP as supporting regulation, monitoring, and oversight under Laws 13.756/2018 and 14.790/2023. See the Ministry of Finance SIGAP page and its technical documentation.
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