API Reference

Complete Convert File Fast API documentation. Convert files to PDF using our simple and scalable REST API.

Base URL

https://api.convertfilefast.com

Authentication

Use the X-API-Key header with your key

MCP server for AI agents

ConvertFileFast is also available as a Model Context Protocol server. Use it to give Claude, Cursor, Codex and other MCP-compatible agents access to file conversion, PDF tools and image tools with the API key owned by that user.

Remote MCP

https://mcp.convertfilefast.com/mcp

Send X-API-Key or Authorization: Bearer with each request.

Local stdio

npx -y convertfilefast-mcp

Also available on PyPI as convertfilefast-mcp.

MCP landing page/MCP package docs

Endpoints

Documents to PDF

HTML to PDF

PDF to Others

PDF Operations

Image Conversion

Images to PDF

Image Operations

Data Conversion

Supported Formats

.docxWord

.xlsxExcel

.pptxPowerPoint

.htmlHTML

.mdMarkdown

.jpg/.pngImages

.txtText Extract

.pdfPDF Operations

Error Codes

400Invalid file or unsupported format

401Missing or invalid API Key

413File exceeds size limit

429Monthly conversion limit reached

500Internal server error