HTTP 402 + x402 + MCP + OpenAPI

Server402 x402 Paid API Marketplace

English-first paid APIs for AI agents. Discover a service, inspect schemas, receive HTTP 402 payment instructions, pay with x402 or Server402 token flow, then retry the same API call.

Agent Workflow

Read /.well-known/server402.json or /llms.txt.
Search /api/catalog/search?q=your-task.
Inspect inputSchema, outputSchema, examples, pricing, and quality.
Call the API once to receive 402 Payment Required.
Pay, then retry with X-Payment-Token, x402 signature, or MCP paymentToken.

Discovery Formats

OpenAPI 3.1 operations for importers and tool builders.
MCP Streamable HTTP tools for agent runtimes.
x402 Bazaar metadata in payment-required responses.
Robots, sitemap, and llms.txt for crawlers and LLM context.

Featured Paid APIs

Word CountCount Unicode characters, whitespace-delimited words, and lines in a text string.
SlugifyConvert an English title into a lowercase URL-safe slug.
TimestampReturn the current server time in UTC RFC3339 format and Unix seconds.
Proxy Health通过 backendUrl 转发到真实服务的付费代理示例。
Random UuidGenerate a random UUID by calling a third-party HTTP API.
Hk WeatherGet current weather in Hong Kong, including temperature, relative humidity, and wind speed, from Open-Meteo.
Multilingual OCRRecognize printed text from a public image URL. Use this OCR API for mixed or unknown-language images; pass optional language and layout hints when the schema supports them.
Docmind Trade Package ExtractSubmit a Trade Document Package extraction job to Alibaba Cloud Document Mind from a public file URL.
Docmind Doc Parser SubmitSubmit a large-model document parsing job to Alibaba Cloud Document Mind from a public file URL.
Docmind Doc Parser StatusQuery the processing status of an Alibaba Cloud Document Mind large-model document parsing job.
Docmind Doc Parser ResultFetch parsed layout and content results for an Alibaba Cloud Document Mind large-model job.
Docmind Doc Structure SubmitSubmit a document structure parsing job to Alibaba Cloud Document Mind from a public file URL.
Docmind Doc Structure ResultFetch document structure parsing results from Alibaba Cloud Document Mind by job ID.
Docmind Digital Doc Structure SubmitSubmit a digital document structure parsing job to Alibaba Cloud Document Mind from a public file URL.
Docmind Table Understanding SubmitSubmit a table understanding job to Alibaba Cloud Document Mind from a public file URL.
Docmind Table Understanding ResultFetch table understanding results from Alibaba Cloud Document Mind by job ID.
Docmind Document Extract SubmitSubmit a document extraction job to Alibaba Cloud Document Mind from a public file URL.
Docmind Document Extract ResultFetch document extraction results from Alibaba Cloud Document Mind by job ID.
Docmind Document Compare ResultFetch document comparison results from Alibaba Cloud Document Mind by job ID.
Docmind Pdf To Word SubmitSubmit a PDF-to-Word conversion job to Alibaba Cloud Document Mind from a public file URL.
Docmind Pdf To Image SubmitSubmit a PDF-to-image conversion job to Alibaba Cloud Document Mind from a public file URL.
Docmind Pdf To Excel SubmitSubmit a PDF-to-Excel conversion job to Alibaba Cloud Document Mind from a public file URL.
Docmind Pdf To Markdown SubmitSubmit a PDF-to-Markdown conversion job to Alibaba Cloud Document Mind from a public file URL.
Docmind Image To Word SubmitSubmit an image-to-Word conversion job to Alibaba Cloud Document Mind from public image URLs.