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mcp-graphql-bridge: Instructions file for Claude Code

CLAUDE.md

mcp-graphql-bridge CLAUDE.md is an instructions file for Claude Code from murilojrpereira/mcp-graphql-bridge. It costs 685 tokens per session, scanned A, original, MIT.

A project instruction file for a coding agent working on a server that turns a GraphQL API into tools for MCP clients. It describes the source layout, build and test commands, transport options, and release rules.

In plain words
What is it for?
Use it to build and test the server, understand how GraphQL operations become tools, and follow the documented source and release conventions.
Why use it?
It gives the agent the project's known commands and boundaries, reducing the chance of changing the wrong file or performing an unrequested release action.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is murilojrpereira/mcp-graphql-bridge's own configuration. It tells Claude Code how to work on mcp-graphql-bridge itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-graphql-bridge configures →

not rated 1repo 6d ago A scan 685 tokens original MIT
View source ↗ murilojrpereira/mcp-graphql-bridge
Reuse

Borrowing it

Nothing to install: this file belongs to murilojrpereira/mcp-graphql-bridge. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/murilojrpereira/mcp-graphql-bridge/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/murilojrpereira/mcp-graphql-bridge

Made for: Claude Code.

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Per session 685 This file is loaded in full into every session.
When invoked 685 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00685 $0.00685
Opus 5.5 $0.00274 $0.00274
Sonnet 5.5 $0.00137 $0.00137
Haiku 4.5 $0.00068 $0.00068

Measured 1mo ago against content hash 3e15dc59c3b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-graphql-bridge CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

MCP server that bridges any GraphQL API to MCP clients: it introspects the schema and registers one tool per query and mutation. Published to npm and the MCP Registry as mcp-graphql-bridge. See README.md for usage and docs/architecture.md for design rationale.

Commands

npm run build        # tsc → dist/
npm test             # vitest
npm run dev          # watch mode
npm start            # run the compiled server (stdio)
npm run start:http   # run with MCP_TRANSPORT=http

There is no lint or format script; CI runs npm ci, npm run build and npm test.

Layout (src/)

File Responsibility
index.ts Entry point. stdio by default; MCP_TRANSPORT=http starts the HTTP transport
introspection.ts Schema introspection and type helpers (getBaseType, typeString)
tools.ts Applies schema filters and registers the tools (registerTools)
operation.ts Builds GraphQL operation strings (buildOperation), detects mutations in raw queries
zod.ts GraphQL argument types → Zod (argToZod, buildArgsSchema)
executor.ts Executes operations against the endpoint, incl. per-call overrides
auth.ts Authorization for the HTTP transport (isAuthorized)
types.ts Shared types

Tests live in src/__tests__/, one file per module.

Conventions

  • TypeScript strict mode, ESM with module: Node16: relative imports must end in .js (import ... from "./tools.js"). No any without justification.
  • Secrets (configured and per-call tokens/headers) are redacted from error text and response bodies before they reach the calling LLM. Keep it that way when touching executor.ts.
  • GRAPHQL_INCLUDE_MUTATIONS=false must keep every mutation unreachable, including through the generic query tool (queryContainsMutation). Do not weaken that path.
  • If you add, remove or rename an environment variable, update the README table and environmentVariables in server.json.
  • Add a ## [Unreleased] entry to CHANGELOG.md for user-visible changes.

Read the full file on GitHub · 58 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 58 lines · 685 tokens per session scan A 3e15dc59c3b1

Subscribe to this mod's changes

mcp-graphql-bridge CLAUDE.md is an instructions file published in the GitHub repository murilojrpereira/mcp-graphql-bridge (1 stars, last pushed 6d ago), licensed MIT. It adds 685 tokens to every session, about $0.0027 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-21.

Backend and APIsBuilding agentsgraphqlmcpmcp-servermodel-context-protocol
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