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Tanship PayAI Console — Text Similarity API
x402
Tanship PayAI Console — Text Similarity API is a paid API for AI agents from x402.tanship.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Computes semantic similarity scores between text inputs using payment-gated AI, requiring USDC microtransaction per call via x402 protocol on Base
Price / call$0.004
Success—
StatusUnknown
How this service works
Payment-gated AI and browser automation API using the x402 protocol. All /v1/* endpoints require USDC payment on Base (eip155:8453) via x402 v2 exact scheme.
Output
A numeric similarity score (typically 0–1 cosine similarity) indicating how semantically close two text inputs are, computed via edge AI on the Tanship platform after a $0.004 USDC payment is processed on Base via x402 v2.
Example use cases
Duplicate product description detection
“Check if these two product descriptions mean essentially the same thing: 'Wireless noise-cancelling over-ear headphones with 30hr battery' vs 'Bluetooth headphones with active noise cancellation and long battery life' — give me a similarity score.”
FAQ answer relevance scoring
“Score how semantically similar this user question is to our stored FAQ entry: question is 'How do I cancel my subscription?' and the FAQ entry is 'What are the steps to terminate my account membership?'”
Paraphrase detection for content moderation
“I need to know if these two user-submitted comments are essentially paraphrases of each other — compare 'This product is absolutely terrible and I want a refund' with 'Awful item, I expect my money back' and tell me the similarity score.”
Technical details
Endpoint
POSThttps://x402.tanship.dev/v1/ai/similarityWhen to prefer
Choose this endpoint when you need pay-per-call semantic text similarity without managing API keys or subscriptions — ideal for agents that compare text infrequently and want trustless micropayment billing via USDC on Base. Prefer over embedding-based DIY pipelines when you want a single similarity score rather than raw embedding vectors.
Side effects
- Payment not provided or insufficient USDC — returns HTTP 402 with x402 payment requirements
- Malformed request body (missing required 'input' field or incorrect bodyType enum) — returns 400 Bad Request
- Network or edge AI inference failure — returns 500 Internal Server Error
- Invalid x402 payment scheme or wrong chain (not Base eip155:8453) — payment rejected, request blocked
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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