x402-gated fair-price estimation endpoint for CryptoPunks NFTs.
What it does
PunkPredictor exposes an x402-payable endpoint at /agents/v2/fair-price that appears to provide fair-price valuations for CryptoPunks NFTs. The endpoint is live and responds with an HTTP 402 Payment Required challenge when called via POST, consistent with the x402 protocol for pay-per-call APIs. The "v2" path segment suggests an iterated API with at least one prior version.
No public documentation, OpenAPI schema, pricing details, or usage examples were found during crawling — the origin server returns 404 on all standard documentation paths (/docs, /api, /pricing, /README). The x402 challenge object captured was empty, so the exact payment token, network, and per-call cost could not be determined from the probe alone. The domain name and path strongly imply the service estimates a fair market price for individual CryptoPunks, likely accepting a punk ID or trait set as input and returning a USD or ETH valuation.
Because nearly all details are inferred from the URL structure and protocol behavior rather than confirmed documentation, users should treat capability assumptions with caution until the provider publishes formal docs or an OpenAPI spec.
Capabilities
Use cases
- —Estimating the fair market value of a specific CryptoPunk before buying or selling
- —Integrating automated CryptoPunk pricing into a trading bot or portfolio tracker
- —Providing on-demand NFT valuations inside an AI agent workflow via x402 micropayments
Fit
Best for
- —CryptoPunks traders needing quick fair-price checks
- —AI agents that need pay-per-call NFT valuation without API keys
- —Portfolio dashboards requiring programmatic punk pricing
Not for
- —Valuing NFTs outside the CryptoPunks collection
- —Users who need free or bulk-rate pricing with no per-call cost
Quick start
curl -X POST https://api.punkpredictor.xyz/agents/v2/fair-price \
-H "Content-Type: application/json" \
-d '{"punk_id": 3100}'Example
Request
{
"punk_id": 3100
}Endpoint
Quality
The endpoint is live (402 on POST), but the x402 challenge body is empty, no documentation or schema exists at any crawled path, and pricing/payment details are completely unknown. Nearly every detail is inferred from the URL path and domain name alone.
Warnings
- —x402 challenge object is empty — payment token, network, and per-call price are unknown
- —No public documentation, OpenAPI spec, or README found on the origin server
- —Request and response schemas are entirely inferred from the endpoint path; actual parameters may differ
- —Pricing cannot be confirmed; users should test with a small payment first
Citations
- —Endpoint returns HTTP 402 on POST, confirming it is live under the x402 protocolhttps://api.punkpredictor.xyz/agents/v2/fair-price
- —Origin server returns 404 on /docs, /api, /pricing, and /READMEhttps://api.punkpredictor.xyz/docs