About Text Classifier X402
Text Classifier X402 is an MCP and HTTP API for agents and applications that need to categorize text. It returns topic confidence scores, detected language, readability, and content type, with calls paid in USDC through x402.
Key features
- 01Topic classification with confidence scores
- 02Optional custom categories
- 03Language detection
- 04Readability and content-type analysis
- 05USDC payments via x402
Use cases
- 01Tagging and organizing text by topic
- 02Routing text based on its category
- 03Reviewing language and readability
- 04Classifying content without an API key
MCP support
Exposes the `text_classify_content` tool to MCP clients for classifying text. The HTTP API also uses x402 payments in USDC on Base.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://text-classifier.api.klymax402.com/mcpclaude mcp add --transport sse text-classifier-x402 https://text-classifier.api.klymax402.com/mcp{"mcpServers":{"text-classifier-x402":{"type":"sse","url":"https://text-classifier.api.klymax402.com/mcp"}}}Open in Cursor{"servers":{"text-classifier-x402":{"type":"sse","url":"https://text-classifier.api.klymax402.com/mcp"}}}Open in VS Code{"mcpServers":{"text-classifier-x402":{"type":"sse","url":"https://text-classifier.api.klymax402.com/mcp"}}}{"mcpServers":{"text-classifier-x402":{"serverUrl":"https://text-classifier.api.klymax402.com/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project READMEText Classifier API
Classify text into categories with confidence scores, readability analysis, and content type detection. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"text-classifier": {
"url": "https://text-classifier.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://text-classifier.api.klymax402.com/api/classify" \
-H "Content-Type: application/json" \
-d '{"text":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
text_classify_content | POST | /api/classify | $0.012 | Classify text content into categories with confidence scores and readability metrics |
text_classify_content
Use this when you need to categorize text into topic categories (tech, finance, health, sports, politics, entertainment, science, business). Returns top 3 categories with confidence scores, detected language, Flesch-Kincaid readability level, and content type (article/review/tutorial/news). Ideal for content organization, tagging, and routing. Do NOT use for sentiment — use text_analyze_sentiment. Do NOT use for summarization — use ai_summarize_text.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
text | string | yes | The text content to classify (min 50 characters for accurate results) |
categories | array | no | Optional custom categories to classify against. Default: tech, finance, health, sports, politics, entertainment, science, business |
Example agent prompts
- "Categorize text into topic categories (tech, finance, health, sports, politics, entertainment, science, business)"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
Comments
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