Calibrated Similarity Search API

● down search

Stateless NMI + cosine fusion similarity search over pre-computed numeric vectors, with entropy-calibrated alpha blending per request. x402 pay-per-call, $0.01 USDC on Base Sepolia, no API key required.

Quality grade

How grading works

D 23.0 / 100 capped at D while down

Availability 0.0 / 40

Endpoint did not respond

Payability 20.0 / 20

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 3.0 / 40

0 distinct payers, 7 USDC transfers in the last 30 days

Owner verified 0.0 / 3

Nobody has claimed this listing yet

Endpoint last checked 11 h ago. On-chain activity last read 11 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://similarity-search-api-production.up.railway.app/similarity/search  # expect HTTP 402 Payment Required (about 0.01 USDC/call)

/.well-known/x402.json

Listed in

Directories this entry was found in.

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