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zapier-dev-mcp

zapier-dev-mcp

by koleharv
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zapier-dev-mcp

An MCP server for people who build Zapier integrations. Zapier MCP lets AI use Zapier apps — this server helps you ship one. Point Claude at your zapier-platform-cli project:

  • "What's in this integration?" — triggers, creates, searches, auth, platform version, request hooks

  • "Is it ready for app review?" — a lint pass encoding the things Zapier's review commonly bounces integrations for

  • "Run the validator" — wraps your project's own zapier validate

Quick start

Claude Code

claude mcp add zapier-dev -- npx -y zapier-dev-mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "zapier-dev": {
      "command": "npx",
      "args": ["-y", "zapier-dev-mcp"]
    }
  }
}

Then: "Lint C:\code\my-zapier-app and walk me through fixing the errors."

Related MCP server: MCP Spectral

Tools

Tool

What it does

inspect_integration

Structured summary of the app definition

lint_integration

Review-readiness report: errors / warnings / info, each anchored to a component path

generate_test_fixtures

Ready-to-run bundle mocks (typed inputData, authData from your auth fields) plus an appTester test skeleton per component

validate_integration

Runs the project's own zapier validate (schema + style), with install guidance if the CLI is missing

What the linter checks

  • Missing operation.sample on visible actions — required for public apps, and the single most common review bounce

  • Dynamic dropdowns ("trigger_key.id.label") referencing triggers that don't exist

  • Missing display.label / display.description / noun; unlabeled input fields

  • Definition version vs package.json version mismatch; platformVersion vs the zapier-platform-core dependency

  • Auth without a connectionLabel (users can't tell accounts apart)

  • Key/map-key mismatches and duplicate keys

hidden components skip the visibility checks. The linter complements zapier validate — schema validation catches malformed definitions; this catches reviewable-but-rough ones.

Notes

  • Inspecting a project evaluates its entry module in a child process (with a timeout and output cap) — exactly what the Zapier CLI itself does. Only point it at projects you trust, i.e. your own.

  • Computed input fields (functions) can't be linted statically; they're skipped, not flagged.

  • Not affiliated with or endorsed by Zapier. zapier-platform-cli is Zapier's open-source SDK.

Development

npm install
npm test                 # offline tests — synthetic projects written in-suite
npm run build            # tsc → dist/
node scripts/smoke.mjs   # end-to-end: generates a project, drives the server over stdio

Architecture: src/extract.ts (definition extraction via child process) and src/lint.ts (pure review checks) carry the logic; src/index.ts is the MCP wiring.

License

MIT

Available Tools

4 tools
generate_test_fixturesGenerate test fixturesA

Ready-to-run test scaffolds for the integration: a bundle mock (authData from the auth fields, typed inputData from each component's input fields) plus a zapier-platform appTester test skeleton per trigger/create/search. Optionally target one component.

Inputs: path (required), component.

inspect_integrationInspect a Zapier integrationA

Structured summary of a zapier-platform-cli project: triggers, creates, searches, authentication, platform version, request hooks. Note: this evaluates the project's own entry module (exactly as the Zapier CLI does).

Inputs: path (required).

lint_integrationLint for review readinessA

Checks a Zapier integration against common app-review blockers: missing sample data, unlabeled input fields, missing descriptions/nouns, dynamic dropdowns referencing nonexistent triggers, version mismatches. Complements (does not replace) zapier validate.

Inputs: path (required).

validate_integrationRun zapier validateA

Runs the project's own zapier validate (schema + style checks) via npx. Requires zapier-platform-cli in the project or globally; returns install guidance if missing.

Inputs: path (required).

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    Deploy Server
    Claude Code, inside the Godot 4 editorFlockbay puts an AI agent in the real Godot 4 editor: it writes GDScript, runs your game and fixes what breaks. Free, or bring your own Claude Code or Codex.flockbay.comAd

    TDQS

    A3.9/5.0

    Scored across 4 tools

    Disambiguation4/5

    Each tool has a clear primary purpose: generating fixtures, inspecting, linting, and validating. However, lint_integration and validate_integration are both quality checks, and an agent might need to read descriptions carefully to pick the right one.

    Naming Consistency5/5

    All tool names follow a consistent verb_noun pattern in snake_case: generate_test_fixtures, inspect_integration, lint_integration, validate_integration. The verbs clearly indicate actions and nouns uniformly refer to integration artifacts.

    Tool Count5/5

    Four tools is a well-scoped set for a Zapier development helper. Each tool covers a distinct phase (generate, inspect, lint, validate) without redundant utilities, fitting the recommended 3-15 range.

    Completeness4/5

    The set covers the core lifecycle for integration quality: generating test fixtures, inspecting structure, linting for blockers, and running official validation. A notable gap is the lack of a tool to execute tests or apply fixes, but the surface is reasonably complete for analysis tasks.

    Maintenance

    ActivityMaintained
    ResponsivenessNo recent community issues

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