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PaySponge Embeddings API (x402 Pay-per-Call)
x402
PaySponge Embeddings API (x402 Pay-per-Call) is a paid API for AI agents from api.paysponge.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Generates vector embeddings for input text, gated by on-chain micro-payment via x402 (USDC on Base or SPL tokens on Solana)
Price / call$0.01
Success—
StatusUnknown
How this service works
Service: OpenRouter API (https://api.paysponge.com/embeddings)
Output
Returns a JSON object containing a vector embedding (array of floats) representing the semantic content of the input text, delivered after on-chain payment confirmation via x402 protocol.
Example use cases
Example prompt
“Generate vector embeddings for the text 'the quick brown fox jumps over the lazy dog' using the PaySponge pay-per-call embeddings endpoint — I'll pay the $0.01 USDC fee on Base.”
Technical details
Endpoint
POSThttps://api.paysponge.com/x402/purchase/svc_d5zgtpg00dvssgj28/embeddingsWhen to prefer
Choose this endpoint when you need vector embeddings and want to pay per-call with crypto (USDC on Base or SPL tokens on Solana) without an API subscription or API key — ideal for agents operating in Web3 contexts or autonomous payment pipelines using the x402 protocol.
Side effects
- Payment not provided or insufficient — 402 Payment Required with payment instructions
- Invalid or malformed input body — 400 Bad Request
- Payment on unsupported chain or token — payment rejected
- Network congestion on Base or Solana delays payment confirmation
- Empty or missing input field — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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