How does payment work for Content Classifier?
Each paid classification call costs $0.005 USDC on Base mainnet via the x402 v2 protocol. The payment is settled independently per request.
@garyedgington
基本信息
Classify text or JSON input into structured categories using Claude AI — with no setup, no API keys, and no credentials required. Connect directly and start classifying immediately.
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"x402-classifier": {
"url": "https://web-production-2d1051.up.railway.app/sse"
}
}
}Classify text or JSON input into a category using Claude AI. Supports five built-in presets and caller-supplied custom taxonomies. Returns the top label, confidence score, ranked list of all labels, and an optional one-sentence reasoning string. Args: input: Text or JSON string to classify. Max 32KB. input_type: "text" (default) or "json". When json, the string is parsed before classification. preset: Built-in taxonomy — sentiment | topic | intent | urgency | custom. sentiment: positive, neutral, negative. topic: technology, finance, health, legal, science, sports, other. intent: question, request, complaint, feedback, informational. urgency: critical, high, medium, low. custom: use your own labels via the taxonomy parameter. taxonomy: Required when preset=custom. List of 2–20 label strings. multi_label: When True, labels array contains all taxonomy labels ranked by confidence. explain: When True, include a one-sentence reasoning string. Returns: label (str), confidence (float), labels (list), reasoning (str|null), meta (dict).
Classify text into a category using Claude AI (free trial — limited presets, 4KB max). Supports sentiment and topic presets only. Multi-label is always disabled. Use classify_content for full access: all presets, custom taxonomies, 32KB input. Args: input: Text to classify. Max 4KB on trial. preset: sentiment (positive/neutral/negative) or topic (technology/finance/health/…). explain: When True, include a one-sentence reasoning string. Returns: label (str), confidence (float), labels (list), reasoning (str|null), meta (dict).
Content Classifier is an MCP server that classifies text or structured data into categories using Claude AI. It supports preset taxonomies (sentiment, topic, intent, urgency) or custom user-defined labels, with optional confidence scoring and multi‑label output. The server is part of the x402 micropayment task market and charges $0.005 USDC per call on Base mainnet.
The server exposes a single MCP tool classify_content via SSE transport at https://project-classifier-production.up.railway.app/sse. REST endpoints are also available: POST /v1/classify (paid, requires x402 payment header) and POST /v1/classify/trial (free, with limits). Provide parameters such as input, preset, taxonomy, multi_label, and explain to classify content.
Each paid classification call costs $0.005 USDC on Base mainnet via the x402 v2 protocol. The payment is settled independently per request.
Built‑in presets are `sentiment`, `topic`, `intent`, `urgency`, and `custom`. When using `custom`, you must provide a taxonomy array of your own labels.
Yes. The `POST /v1/classify/trial` endpoint is free but limited to 4KB input size, single‑label output only, and only the `sentiment` and `topic` presets.
The response includes a `label`, `confidence` score, optional `reasoning` string, and a ranked `labels` array when `multi_label` is true. Metadata such as the preset and model is also returned.
Yes. Set `preset` to `"custom"` and include a `taxonomy` array of your labels in the request body.

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