grantd-mcp

Item: grantd-mcp
Rating: 38
Author: M8ven

OAuth token broker for AI agents to securely act on a user's behalf across third-party APIs (Gmail, Slack, GitHub, Notion, etc.) by vaulting tokens server-side and never exposing them to the LLM.

→ rafavecchi/grantd · listed on glama

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// key findings

🚨

Secret credentials may flow to a network call

1 flow detected: GRANTD_API_KEY. We can’t prove the destination matches the brand the credential belongs to.

⚠️

Known vulnerabilities in dependencies: 6 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

⚠️

Tests do not pass

Either the test suite is broken or the code regressed. Either way the published behaviour can’t be verified by the publisher’s own tests.

🔐

You'll be asked for 2 credentials: CLIENT_SECRET, GRANTD_API_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies6 high24 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@hono/node-server@1.13.7GHSA-wc8c-qw6v-h7f6

@hono/node-server has authorization bypass for protected static paths via encoded slashes in Serve Static Middleware

highhono@4.6.14GHSA-3vhc-576x-3qv4

Hono JWK Auth Middleware has JWT algorithm confusion when JWK lacks "alg" (untrusted header.alg fallback)

highhono@4.6.14GHSA-88fw-hqm2-52qc

hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

highhono@4.6.14GHSA-f67f-6cw9-8mq4

Hono JWT Middleware's JWT Algorithm Confusion via Unsafe Default (HS256) Allows Token Forgery and Auth Bypass

highhono@4.6.14GHSA-m732-5p4w-x69g

Hono Improper Authorization vulnerability

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// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

🔐 secretCLIENT_SECRET

configDATABASE_URL— cp .env.example .env # then paste keygen output + your

🔐 secretGRANTD_API_KEY— env =sk_... \

configGRANTD_BASE_URL— env =https://your-broker.example.com \

configGRANTD_END_USER— env =user-123 \

configSCOPES

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 7 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/rafavecchi-grantd-y29n8i)](https://m8ven.ai/mcp/rafavecchi-grantd-y29n8i)

commit: 948813e170829af268ccc5cf90861ae2744d4b73

code hash: d6b4d59219d5192695db23c7e96d5fdaa54128173e35dd49b6313d7757cee800

verified: 7/30/2026, 8:06:47 PM

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