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Directory / Joinville Boas Ofertas
Joinville Boas Ofertas
by joinvilleboasofertas.com · https://mcp.joinvilleboasofertas.com/mcp
Preços e ofertas vigentes de supermercados de Joinville/SC, revisados antes de publicar. Só leitura.
13 of 13 checks · 1 Nov 2026
Is Joinville Boas Ofertas MCP server safe?
- None of the hidden-instruction wordings we know were found in its tool descriptions.
- Its error messages showed no secrets or internal details.
- All 11 of its tools are labeled read-only.
- Overall it scored 70/100 on 1 Nov 2026.
A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.
What it can do
11 tools, in the server's own words.
search_offersread-onlyBusca ofertas por produto, categoria, mercado, preço máximo ou vencimento hoje, com paginação; passe o mercado em market, não no texto.
find_cheapestread-onlyEncontra o menor preço de um produto ou tipo de produto, agrupado por produto, com alternativas em outros mercados.
compare_productread-onlyCompara um produto específico (slug, id ou texto) entre os mercados, do mais barato ao mais caro, com a média e os últimos preços conhecidos.
top_dealsread-onlyLista as melhores ofertas pela economia em relação à média, no geral, por categoria ou por mercado.
list_marketsread-onlyLista os mercados cobertos com endereços e quantidade de ofertas; use query para confirmar o nome de um mercado.
get_marketread-onlyMostra um mercado (slug, id ou nome): endereços, destaques, categorias e ofertas paginadas.
list_categoriesread-onlyLista as categorias de produto com a quantidade de ofertas e de mercados.
basic_basketread-onlyCalcula o custo da cesta básica por mercado; com market, detalha os itens daquele mercado.
get_offerread-onlyMostra o detalhe completo de uma oferta já devolvida por outra ferramenta, com o encarte de origem.
searchread-onlyBusca ofertas vigentes e devolve até 20 resultados com id, título (preço, mercado e validade) e url; segue o contrato do conector do ChatGPT.
fetchread-onlyDevolve o texto completo de uma oferta pelo id vindo de search; segue o contrato do conector do ChatGPT.
Test results
Safe mode: only tools labeled read-only were run. How the test works
- ✕Tools work with good inputsfail
1 failed
- ✕find_cheapest: Crashed: server error (HTTP 502)
- and 10 more
- !Fast enoughnote
1 warning
- !compare_product: Slowest tool: compare_product (8.0 s): users will notice the wait
- and 3 more
- !Follows MCP best practices (not scored yet)note
2 tips (not scored)
- !Very common tool names: search, fetch. Next to other servers' tools the AI may mix them up; a short prefix helps (like "github_search" instead of "search").
- !The tool list is about 63 KB (roughly 16k tokens). AI apps send it with every message, so it takes that much of the AI's memory before any work starts.
- !Resources and prompts worknote
6 warnings (2 resources, 4 prompts)
- !onde_mais_barato: Inputs with no description: produto
- !comparar_produto: Inputs with no description: produto, mercado
- !melhores_ofertas: Inputs with no description: categoria, mercado
- !cesta_basica: Inputs with no description: mercado
- !onde_mais_barato: Leaving out a required input gets an internal error instead of an "invalid input" error: Internal server error
- !comparar_produto: Leaving out a required input gets an internal error instead of an "invalid input" error: Internal server error
- and 3 more
- ✓ConnectsConnected in 726 mspass
- ✓Ready for the newest MCP versionUses the latest MCP version (2026-07-28)pass
- ✓Lists its toolsFound 11 toolspass
- ✓Every tool is describedAll 11 tools and their inputs are describedpass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Bad inputs give a clean errorpass
All good
- ✓search_offers: Refused wrong type for "ending_today" with a clear error
- ✓find_cheapest: Refused missing required input "query" with a clear error
- ✓find_cheapest: Refused wrong type for "query" with a clear error
- ✓compare_product: Refused missing required input "product" with a clear error
- ✓compare_product: Refused wrong type for "product" with a clear error
- ✓top_deals: Refused wrong type for "ending_today" with a clear error
- ✓list_markets: Refused wrong type for "with_active_only" with a clear error
- ✓get_market: Refused missing required input "market" with a clear error
- and 7 more
- ✓Tools work togetherpass
5 chains working
- ✓search_offers → get_offer: get_offer found what search_offers returned (offer_id = "d180081f-0735-4bf5-b2d0-a6405ecc2821")
- ✓compare_product → get_offer: get_offer found what compare_product returned (offer_id = "d2cae8e6-be12-4067-a466-acafd56d08ff")
- ✓top_deals → get_offer: get_offer found what top_deals returned (offer_id = "8d369b84-2ffc-4c30-8898-b1da0e3b7f1d")
- ✓search → fetch: fetch found what search returned (id = "a6b3143f-db6a-45a9-8736-23c2ec1e1078")
- ✓search → get_offer: get_offer found what search returned (offer_id = "a6b3143f-db6a-45a9-8736-23c2ec1e1078")
- ✓No secrets leakedChecked 38 error messages: no secrets or internal detailspass
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://mcp.joinvilleboasofertas.com/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/com-joinvilleboasofertas-ofertas.html)Score over time
- 1 Nov 202670
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use Joinville Boas Ofertas, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor (coming soon) tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. You'll also be able to claim this page and get a verified owner mark. Founding price: $19/month for life for the first 50 teams.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works