Generate images via OpenAI through a pay-per-request x402 agent on Base Sepolia.
What it does
This x402 endpoint, hosted by Questflow, wraps OpenAI's image generation capability behind a micropayment wall using the x402 protocol. Callers send a POST request with a text prompt in the `input` field and receive a generated image (or a text response describing/linking the image) from the agent. Payment is handled via an `X-PAYMENT` header using USDC on the Base Sepolia testnet.
The endpoint accepts a simple JSON body with a single required `input` string field — your prompt to the image-generation agent. The x402 challenge specifies a maximum cost of 100,000 units of USDC (on Base Sepolia, asset contract `0x036CbD53842c5426634e7929541eC2318f3dCF7e`) per request, with a maximum timeout of 1,200 seconds. The payment recipient address is `0xB82eA8A4165c5024c56BC445a917EF50351E2b54`.
Questflow is the platform behind this agent. Their broader product focuses on autonomous AI "clones" for onchain market trading and alpha discovery, but this specific endpoint is a standalone image-generation agent. Documentation beyond the x402 challenge schema is not available — there is no OpenAPI spec, no dedicated docs page, and the crawled site focuses on Questflow's clone/trading product rather than this image endpoint. As a result, details about supported image sizes, models used, rate limits, and exact output format are unknown.
Capabilities
Use cases
- —Generating images from text prompts with micropayment-gated access
- —Agent-to-agent image generation where the caller pays per request via x402
- —Prototyping pay-per-use AI image services on Base Sepolia testnet
Fit
Best for
- —Developers experimenting with x402 payment-gated AI endpoints
- —Agents that need on-demand image generation with crypto micropayments
- —Testing pay-per-call image generation flows on a testnet
Not for
- —Production workloads requiring mainnet payments (this uses Base Sepolia testnet)
- —Users needing detailed control over image parameters like size, style, or model version
- —High-throughput image generation (1200s max timeout suggests single-request processing)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:687f06f575c60d9158e812f4 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <your-x402-payment-header>" \
-d '{"input": "A futuristic cityscape at sunset"}'Example
Request
{
"input": "A futuristic cityscape at sunset with flying cars"
}Response
{
"response": "https://example.com/generated-image-url.png"
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) with a clear input/output schema from the x402 challenge, but there is no OpenAPI spec, no dedicated documentation, and the crawled site content is about Questflow's trading clone product rather than this image agent. Output format, supported models, image parameters, and exact pricing semantics are all unknown.
Warnings
- —No OpenAPI or dedicated documentation available for this endpoint
- —Uses Base Sepolia testnet USDC — not suitable for production/mainnet use
- —Exact output format is unknown; the example response is inferred from the schema description
- —maxAmountRequired of 100000 units — actual USD value depends on USDC decimals on testnet
- —1200-second max timeout is unusually long for image generation
Citations
- —The endpoint returns a 402 challenge requiring X-PAYMENT header with USDC on Base Sepoliahttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:687f06f575c60d9158e812f4
- —Questflow is the platform powering this agent endpointhttps://api-dev.intra-tls2.dctx.link
- —The x402 challenge describes the endpoint as 'Generate high-quality images using OpenAI'https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:687f06f575c60d9158e812f4