Synap by Linkrra
GET https://pool.linkrra.com/api/billing/x402/topup
Listed in x402 List · Data: x402-list.com (CC BY 4.0)
Linkrra inference credits — pay-as-you-go top-up ($1-$1000) at $0.2273/M tokens. OpenAI-compatible AI inference paid per call in USDC on Base. GET /v1/models lists the model catalogue with per-model USD prices per million tokens. Pay-per-call chat completions, prepaid credit top-up, and pay-per-call TTS, all via x402 v2 (scheme exact, eip155:8453).
Other endpoints from pool.linkrra.com
The same service's other paid functions that Hagglyai tracks, each with its own price. Functions outside Hagglyai's categories are not listed.
| Endpoint | Category | Price per call |
|---|---|---|
| GET /api/billing/x402/chat/completions | LLM inference | $0.01 |
| POST /api/billing/x402/chat/completions | LLM inference | $0.01 |
| GET /api/billing/x402/tts | LLM inference | $0.01 |
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://pool.linkrra.com/api/billing/x402/topup"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-15 00:30 | Valid 402 | 402 | 967 ms | $1 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves