Discover / x402engine.app

x402engine

■ Challenge detected

x402engine — Premium text-to-speech with ElevenLabs — ultra-realistic voices, multilingual support, custom voice IDs

Listed price
$0.02
Challenge detected
9 of the last 9 checks
Median response
172 ms
Last checked
16 Oct, 18:49 UTC
In our index since
26 Sept 2026

Endpoint

curl -i https://x402engine.app/api/tts/elevenlabs
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
106 listed endpoints · on x402 Bazaar

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

Base URLhttps://x402engine.app/api/llm

  • POST/aion-3.0No price listedx402engine — AionLabs' full reasoning model for analysis and structured generation
  • POST/claude-fable-5.1No price listedx402engine — Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual
  • POST/claude-opus-4.5No price listedx402engine — Anthropic's previous-gen Opus — strong reasoning and creative writing, large context window
  • POST/grokNo price listedx402engine — xAI's current Grok 4 route — strong reasoning and real-time knowledge
  • POST/mimo-v2.6-proNo price listedx402engine — MiMo-V2.6-Pro is the flagship foundation model developed by Xiaomi. Built at a scale of over 1T parameters, it is designed to push the ceiling of capability for the most demanding...
  • POST/gpt-5.6-terraNo price listedx402engine — OpenAI's balanced GPT-5.6 tier for advanced reasoning and agent workflows

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

Showing 6 of 106 listed endpoints. First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402engine.app

Recent checks

3 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.16 Oct 2026
All 9 checks
When (UTC)ResultHTTPResponse
16 Oct, 18:49 UTCChallenge detected200172ms
15 Oct, 11:37 UTCChallenge detected200134ms
14 Oct, 00:19 UTCChallenge detected200232ms
12 Oct, 00:34 UTCChallenge detected200186ms
10 Oct, 10:04 UTCChallenge detected200230ms
9 Oct, 06:42 UTCChallenge detected200133ms
8 Oct, 03:32 UTCChallenge detected200168ms
7 Oct, 03:32 UTCChallenge detected200480ms
3 Oct, 17:05 UTCChallenge detected402145ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 18:49 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 x402engine?

Its listed price is $0.02.

What payment terms does x402engine advertise?

The listing advertises x402, Base, EVM chain 4326, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is x402engine listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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