Discover / x402engine.app

x402engine

■ Challenge detected

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

x402
Base
EVM chain 4326
Solana
USDC
AI

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

GET/travel/hotelsNo price listedx402engine — Search hotels via Google Hotels (SerpApi). Returns properties with prices, ratings, and amenities.
POST/llm/gpt-5.1No price listedx402engine — OpenAI's efficient flagship model — strong all-around performance at lower cost than GPT-5.2
POST/llm/kimiNo price listedMoonshot AI's flagship model — strong reasoning and long-context capabilities
POST/llm/qwen3.5No price listedx402engine — Alibaba's latest model — 1M context, strong multilingual and coding capabilities
POST/llm/claude-opusNo price listedx402engine — Anthropic's most powerful model — best for complex analysis, coding, and extended thinking
GET/travel/flightsNo price listedx402engine — Search flights via Google Flights (SerpApi). Returns best flights, prices, airlines, and price insights.
POST/image/textNo price listedImage generation with accurate text rendering using Ideogram v3 (best for logos, signage)
POST/llm/gpt-5.6-sol-proNo price listedx402engine — OpenAI's maximum-compute GPT-5.6 tier for the hardest agent tasks
POST/llm/claude-sonnet-5.5No price listedx402engine — Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
POST/llm/gpt-4oNo price listedx402engine — OpenAI's flagship multimodal model — strong all-around for text, vision, and reasoning
POST/llm/gpt-6.1-solNo price listedx402engine — GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...
POST/llm/gemini-3-proNo price listedx402engine — Google's Gemini 3.1 Pro Preview on the Gemini Pro compatibility route — advanced reasoning, coding, and multimodal understanding
POST/image/fastNo price listedx402engine — Quick image generation using FLUX Schnell (~2s, good for drafts)
POST/llm/muse-spark-1.1No price listedx402engine — Meta's broad multimodal model with 1M context for media-rich agent workflows
POST/llm/mistralNo price listedx402engine — Mistral's flagship model — strong European AI with great multilingual support
GET/crypto/marketsNo price listedMarket rankings with price, volume, market cap — filterable by category
POST/llm/gpt-5-nanoNo price listedx402engine — OpenAI's cheapest GPT-5 tier — ultra-affordable for high-volume agent tasks
POST/video/minimax-h3No price listedx402engine — Generate a 5-second 768P landscape video with native audio using MiniMax H3
POST/llm/grok-4.5No price listedx402engine — xAI's latest multimodal model with 500k context and strong tool use
POST/llm/glmNo price listedx402engine — Zhipu AI's flagship model — strong multilingual and reasoning performance
POST/tts/openrouterNo price listedx402engine — Voxtral Mini TTS through OpenRouter; 30 voices, MP3 audio, up to 2000 UTF-8 bytes of text
POST/video/animateNo price listedx402engine — Animate a public image into a 5-second video with Kling V3 Pro
POST/llm/kat-coder-pro-v2.5No price listedx402engine — Kwaipilot's stronger coding model for complex software engineering tasks
POST/video/fastNo price listedGenerate a 5-second video with Kling V3 Standard in landscape, portrait, or square format
POST/llm/deepseek-v4-proNo price listedx402engine — DeepSeek's stronger V4 model — advanced reasoning, coding, and long-context analysis

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

Showing 25 of 106 listed endpoints. Next 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)	Result	HTTP	Response
16 Oct, 18:49 UTC	Challenge detected	200	172ms
15 Oct, 11:37 UTC	Challenge detected	200	134ms
14 Oct, 00:19 UTC	Challenge detected	200	232ms
12 Oct, 00:34 UTC	Challenge detected	200	186ms
10 Oct, 10:04 UTC	Challenge detected	200	230ms
9 Oct, 06:42 UTC	Challenge detected	200	133ms
8 Oct, 03:32 UTC	Challenge detected	200	168ms
7 Oct, 03:32 UTC	Challenge detected	200	480ms
3 Oct, 17:05 UTC	Challenge detected	402	145ms

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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