MessyAPI
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API v1StableLast updated Oct 2026Changelog →
Documentation

Build with MessyAPI.

Guides, concepts and reference for the MessyAPI v1 API, its SDKs and the MCP server.

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AI skills & agents
Give Claude, Cursor, ChatGPT and custom agents MessyAPI tools.
Quickstart
Make your first MessyAPI request in under a minute.
Clean a CSV in 2 minutes
From messy spreadsheet to clean rows.
Authentication
Bearer keys and accepted headers.
API keys
Format, storage and lifecycle.
Which API should I use?
Match the question you need answered to the right endpoint.
Test & live modes
Test and live keys, whoami and the environment header.

Flagship

Repair
Send messy data. Get production-ready data back.
Map
Turn incoming data into the exact shape your app expects.
Guard
Stop bad data before it reaches your app.

Core concepts

/process
Chain operations over one record set.
Async jobs
Run large batches outside the request cycle.
Projects & pipelines
Saved, versioned pipelines.
Batch analysis
Score many leads at once with a pipeline summary.
Recovery scores
How the 0–100 lead recovery score works.
Reliability & benchmarks
Deterministic engines checked against labeled cases.

Reference

Errors
One error shape, stable codes, a fix for each.
Versioning & deprecation
What we promise not to break.
Rate limits
Per-organization burst limits.
Usage & metering
Record allowance and credits.
Idempotency
Safe retries with Idempotency-Key.
Retries
When and how to retry.

Access

SDKs & CLI
JavaScript, Python and CLI.
MCP
Connect agents over Model Context Protocol.
RapidAPI
Using MessyAPI through RapidAPI.
OpenAPI & Postman
Machine-readable spec.
JavaScript SDK
Typed client for Node and browsers.
Python SDK
Call MessyAPI from Python.
CLI
Run capabilities over CSV/JSON files from your terminal.
Examples
Copy-paste snippets in common languages.
Postman
Import the collection and test in minutes.