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io.github.opedrosoares/mcp-compras

io.github.opedrosoares/mcp-compras v0.4.0

Security Trust Score
Grade D · Weak posture
Tier 1 · Public sourceLow confidence · 32%
Declared MCP capabilities
ResourcesPrompts

This server scored D. Run it behind runtime policy enforcement so one bad tool call can't become an incident.

Security controls

Deterministic, evidence-backed. Score earned from passing controls; a failed guard caps it.

Model–MCP Runtime Guardrails

  • Pass
    Indirect Prompt Injection (IPI) Defensesguardno injection markers

    Tool/prompt/resource text is free of hidden instructions that could hijack the agent.

  • Pass
    Tool Definition Integrityguardtool definitions stable; no risky changes in version history

    Every consecutive version pair is diffed for new injection markers or destructive scope — a risky diff anywhere in history is a rug-pull (fail, durable); benign description drift warns.

  • Pass
    User-in-the-Loop / Approval Scopeguardno destructive tool scope

    No over-broad or destructive tools (arbitrary shell, bulk-delete) that warrant human approval.

  • Not checked
    Strict JSON Schema Enforcementno source files

    Tool inputs are constrained (additionalProperties:false), so unexpected arguments can't be smuggled in.

  • Not checked
    In-Session Definition Integrityguardno source

    Tool and prompt definitions stay fixed during a session — they don't change after a few calls, which is how runtime-gated rug-pulls slip past one-time review.

Application Security Checks

  • Warn
    Established maintainerrecently published

    Brand-new / single anonymous maintainers raise takeover and malware risk.

    Fix: Publish under an established account/org; add multiple maintainers.

  • Pass
    No known-vulnerable dependencies1 runtime deps, no known CVEs

    Runtime dependencies (parsed from the lockfile) are scanned against OSV.dev for published CVEs. Advisory: flagged dependencies lower the score but don't hard-cap it, since transitive reachability is unproven.

  • Pass
    Package name not typosquattingguarddistinct package name

    Names mimicking popular packages are a common malware delivery vector.

  • Not checked
    No command-injection sinksguardno source

    Untrusted tool input reaching a shell yields remote code execution.

  • Not checked
    No dynamic code executionguardno source

    eval()/exec()/Function() on tool-derived strings allows arbitrary code execution.

  • Not checked
    No path traversalguardno source

    Naive path checks let tools read/write outside intended directories (EscapeRoute-class).

  • Not checked
    No SSRF sinksguardno source

    Fetching tool-supplied URLs can pivot into internal networks and metadata services.

  • Not checked
    No unsafe deserializationguardno source

    pickle/yaml.load/etc. on untrusted data can execute code.

  • Not checked
    No committed secretsguardno source

    Hardcoded keys/tokens in published source are live credentials an attacker can use.

  • Not checked
    Credentials sourced from environmentno source files

    Reading secrets from env/secret stores avoids hardcoding them.

  • Not checked
    Dependencies pinned (lockfile)no source files

    A lockfile makes installs reproducible and resistant to silent dependency swaps.

  • Not checked
    No install/post-install scriptsguardnot determinable from PyPI metadata

    install hooks run arbitrary code on every consumer at install time.

  • Not checked
    Published with provenancenot determinable

    Build provenance attests the artifact was built from the claimed source by CI.

  • Not checked
    Actively maintainedGitHub API unavailable

    Unmaintained servers don't receive security fixes.

  • Not checked
    Repository not archivedguardGitHub API unavailable

    Archived repositories will never be patched.

  • Not checked
    Declares a licenseGitHub API unavailable

    A clear license is required for legal enterprise use.

  • Not checked
    Has a security policyno source files

    A SECURITY.md gives a private path to report vulnerabilities.

  • Not checked
    Signed releasesnot evaluated

    Signed releases let consumers verify artifacts weren't tampered with.

  • Not checked
    Adoption & popularityno adoption signal

    A small, capped nudge from stars/downloads — widely-used servers get more eyes on bugs. It can never offset a real security failure.

Transport & Trust Model

  • Warn
    IAM / Authentication Scopingno authentication handling detected

    OAuth 2.1 / Protected Resource Metadata gates who can invoke tools.

    Fix: Implement OAuth 2.1 with a .well-known/oauth-protected-resource document.

  • Pass
    Transport Encryption (TLS)guardall remotes use HTTPS

    Plaintext HTTP exposes traffic and bearer tokens to interception.

  • Not checked
    No Token Passthroughguardno source

    The client's token is never forwarded to downstream APIs — the server obtains its own, correctly-scoped credential instead.

  • Not checked
    DNS-Rebinding Protectionno source to inspect

    HTTP endpoints reject requests carrying an unlisted Origin, so a malicious web page can't drive the server through the user's browser.

  • Not checked
    Execution Sandboxingno source files

    A container/sandbox image limits blast radius; a server that runs natively has full host access.

  • Not checked
    Network Exposureno source files

    Binding 0.0.0.0 or exposing debug inspectors widens the attack surface.

  • N/A
    Live Endpoint Reachablenot dynamically scanned

    A dynamic scan connected to the declared remote endpoint and it responded — verified live, not a dead URL.

  • N/A
    Authentication Enforced (live)not dynamically scanned

    If the server declares auth is required, it must actually reject anonymous clients. Serving tools to unauthenticated callers is a real exposure.

Tools (100)

compras_versaocompras_arp_listarcompras_pgc_listarcompras_healthcheckcompras_sancao_ceafcompras_sancao_ceiscompras_sancao_cnepcompras_uasg_buscarcompras_uasg_listarcompras_obter_promptcompras_orgao_listarcompras_sancao_cepimcompras_arp_consultarcompras_catmat_buscarcompras_pgc_agregacaocompras_arp_saldo_itemcompras_listar_promptscompras_obter_resourcecompras_pgc_listar_csvcompras_uasg_consultarcompras_orgao_consultarcompras_pncp_pca_listarcompras_arp_adesoes_itemcompras_arp_itens_listarcompras_catmat_consultarcompras_catser_consultarcompras_contrato_faturascompras_contratos_listarcompras_listar_resourcescompras_pgc_por_catalogocompras_pncp_atas_listarcompras_pncp_modalidadescompras_arp_unidades_itemcompras_contrato_empenhoscompras_fornecedor_listarcompras_legado_rdc_listarcompras_montar_dossie_arpcompras_pncp_ata_arquivoscompras_catmat_listar_pdmscompras_contrato_garantiascompras_contrato_cronogramacompras_contratos_consultarcompras_pncp_orgao_unidadescompras_arp_por_fim_vigenciacompras_catmat_listar_gruposcompras_catser_listar_secoescompras_contrato_ocorrenciascompras_contrato_publicacoescompras_fornecedor_consultarcompras_pncp_pca_atualizacaocompras_pncp_pca_por_usuariocompras_arp_buscar_por_objetocompras_catmat_listar_classescompras_catser_listar_classescompras_contrato_responsaveiscompras_legado_pregoes_listarcompras_pncp_contratos_listarcompras_contratos_itens_listarcompras_detalhar_preco_servicocompras_pncp_contratacao_itenscompras_detalhar_preco_materialcompras_fornecedor_cnpj_receitacompras_indicadores_por_periodocompras_pesquisar_preco_servicocompras_pncp_contrato_por_orgaocompras_contratos_item_consultarcompras_indicadores_consolidadoscompras_legado_licitacoes_listarcompras_pesquisar_preco_materialcompras_sancao_acordos_lenienciacompras_checar_sancoes_fornecedorcompras_contratacoes_14133_listarcompras_pesquisar_precos_para_etpcompras_pncp_contratacao_arquivoscompras_legado_itens_pregao_listarcompras_legado_licitacao_consultarcompras_perfil_fornecedor_completocompras_pncp_contratacao_por_orgaocompras_pncp_contratacoes_propostacompras_contrato_historico_aditivoscompras_contratacoes_14133_consultarcompras_contrato_comprasnet_por_uasgcompras_legado_compras_sem_licitacaocompras_pncp_contratacoes_publicacaocompras_buscar_contratacoes_similarescompras_contrato_comprasnet_consultarcompras_fornecedor_contratos_por_itemcompras_legado_itens_licitacao_listarcompras_pncp_contratacoes_atualizacaocompras_comparar_periodos_contratacoescompras_contratacoes_14133_itens_listarcompras_pncp_contratacao_item_resultadoscompras_contratos_listar_por_fim_vigenciacompras_fornecedor_impedimentos_por_itenscompras_legado_itens_sem_licitacao_listarcompras_aggregate_contratacoes_por_periodocompras_pncp_pca_por_classificacao_superiorcompras_contratacoes_14133_resultados_listarcompras_contratacoes_14133_itens_por_contratacaocompras_contratacoes_14133_resultados_por_contratacao