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Text Classifier, Custom Labels
x402
Text Classifier, Custom Labels is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Classifies text into user-defined labels with confidence scores, supporting single-best or multi-label output for any language
Price / call$0.002
Success—
StatusUnknown
How this service works
Text classification with your own labels for agent pipelines: route support tickets, qualify leads, tag feedback, sort emails or moderate comments. Send the text (up to 6,000 characters) and 2 to 30 labels, optionally with a description each; get the best label with a confidence from 0 to 1 and a one-sentence reason, or every label that applies with multi_label. Labels are enforced by a JSON schema, so the answer is always one of yours. Any language. Instructions inside the text are ignored.
Output
Returns the best-matching label (or up to 5 labels when multi_label is true), a confidence score between 0 and 1, and a one-sentence reason explaining the classification. The label is always one of the exact values provided as input, enforced by JSON schema validation.
Example use cases
Support ticket routing pipeline
“I need you to classify this incoming support message into one of these categories: 'billing', 'technical issue', 'feature request', or 'account access'. Here's the message: 'My login stopped working after I updated my password yesterday.' Give me the best label and how confident you are.”
Lead qualification by intent
“Can you classify this inbound sales inquiry into one of these lead types: 'hot prospect', 'needs nurturing', 'not a fit', or 'existing customer'? The message is: 'We're evaluating CRM tools for a 200-person sales team and want to see a demo next week.' Return the single best label with a reason.”
Multi-label comment moderation
“Check this user comment against these moderation labels — 'spam', 'hate speech', 'off-topic', 'promotional', 'harassment' — and flag every label that applies, not just the top one. The comment is: 'Buy followers now at cheap-followers.com, these devs are idiots anyway.'”
Technical details
Endpoint
POSThttps://agentsvc.io/api/v1/proxy/text-classify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, schema-enforced classification into your own custom label set rather than sentiment-only or topic APIs with fixed taxonomies. Ideal for agent pipelines where the label must always be one of a defined list, you need a confidence score to gate downstream actions, or you want multi-label output for overlapping categories. Supports any language without configuration.
Side effects
- Text exceeds 6,000 characters — request rejected
- Fewer than 2 or more than 30 labels provided — validation error
- Labels are ambiguous and confidence is low, potentially returning an unexpected best match
- Instructions field exceeds 400 characters — rejected
- Text contains no meaningful content, resulting in low-confidence random label assignment
- Payment not included or insufficient — x402 payment required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text to classify, max 6,000 chars |
| labels | array | 2 to 30 labels: strings, or objects {label, description} |
| multi_label | boolean | Return every label that applies (max 5) instead of one |
| instructions | string | Optional extra rules, max 400 chars |
Tags
x402
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