Discover / pool.linkrra.com

Synap by Linkrra

■ Challenge detected

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).

Listed price
$0.01
Challenge detected
3 of the last 3 checks
Median response
272 ms
Last checked
17 Oct, 07:50 UTC
In our index since
14 Oct 2026

Endpoint

curl -i https://pool.linkrra.com/api/billing/x402/chat/completions
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
3 listed endpoints · on x402-list.com

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://pool.linkrra.com/api/billing/x402

  • GET/tts$0.01Linkrra Voice TTS — pay-per-call text-to-speech for 0 characters. Returns a WAV clip. Price is computed from this exact text (no estimate, no overdraw), subject to a $0.01 minimum charge per paid call — a clip whose character-based price is below the minimum is quoted and settled at exactly the minimum. No refund path.
  • GET/chat/completions$0.01Linkrra Synap inference — pay-per-call chat completion for model "any catalogue model - generic quote, POST model + messages for an exact price". Price covers up to 4096 output tokens at this model's own per-token price (see GET /v1/models), converted at $0.2273 per million credits. Minimum charge $0.01 per paid call. Unused tokens are not refunded in v1: the difference is credited to your paying wallet address on the topup ledger, to spend on another paid request.
  • GET/topup$1Linkrra inference credits — pay-as-you-go top-up ($1-$1000) at $0.2273/M tokens

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 3 of 3 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/pool.linkrra.com

Recent checks

14 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026
All 3 checks
When (UTC)ResultHTTPResponse
17 Oct, 07:50 UTCChallenge detected402273ms
15 Oct, 23:42 UTCChallenge detected402258ms
14 Oct, 17:17 UTCChallenge detected402272ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 07:50 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Synap by Linkrra?

Its listed price is $0.01.

What payment terms does Synap by Linkrra advertise?

The listing advertises x402, Base and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is Synap by Linkrra listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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