MPPtempoquality 0.88

GPT Image 1.5 generation via micropayments — $0.009–$0.20 per image, ~3s, no API key needed.

Price
per_call
Protocol
mpp
Verified
no
Endpoint
https://stablestudio.dev/api/generate/gpt-image-1.5/generate

What it does

This endpoint generates images using OpenAI's GPT Image 1.5 model, accessed through StableStudio's pay-per-call micropayment platform. It accepts a text prompt and optional parameters for quality (low/medium/high), size (1024x1024, 1536x1024, 1024x1536, or auto), background (transparent/opaque/auto), output format (png/jpeg/webp), compression level, and content moderation strictness. Pricing is dynamic, ranging from $0.009 to $0.20 per generation depending on quality and size settings. Generation takes approximately 3 seconds.

Payment is handled via the MPP protocol (Tempo method on pathUSD) or x402 (USDC on Base, network eip155:8453). No API keys or subscriptions are required — callers POST to the endpoint, receive a 402 payment challenge, sign a USDC/pathUSD authorization, then resubmit with a PAYMENT-SIGNATURE header. The response returns a jobId with status "pending"; callers then poll GET /api/jobs/{jobId} with a SIGN-IN-WITH-X wallet signature header until the job completes and returns an imageUrl.

StableStudio also exposes a companion edit endpoint at /api/generate/gpt-image-1.5/edit that accepts reference images for image editing tasks. The platform hosts many other models (Nano Banana Pro, Flux 2 Pro, Grok, Seedance, Wan, Sora, Veo) for both image and video generation, all using the same payment flow. An MCP server is available via `npx -y agentcash@latest` for agent integration.

Capabilities

text-to-imageimage-generationgpt-image-1.5transparent-backgroundquality-controlmultiple-output-formatsdynamic-pricingmicropaymentx402mpp-tempousdc-baseno-api-keyasync-job-polling

Use cases

  • —Generate images from text prompts with configurable quality and size
  • —Create images with transparent backgrounds for design assets
  • —Produce quick low-cost draft images at $0.009 per call
  • —Agent-driven image generation with crypto micropayments
  • —Batch image creation workflows without subscription commitments

Fit

Best for

  • —Agents or apps needing fast, cheap text-to-image with no API key signup
  • —Generating images with transparent backgrounds (PNG output)
  • —Low-latency image generation (~3 seconds)
  • —Crypto-native applications paying per call with USDC or pathUSD

Not for

  • —High-volume batch jobs where subscription pricing would be cheaper
  • —Users without a crypto wallet (requires USDC on Base or pathUSD on Tempo)
  • —Image editing with reference images (use the /edit endpoint instead)

Quick start

# 1. Send request without payment to get 402 challenge
curl -X POST https://stablestudio.dev/api/generate/gpt-image-1.5/generate \
  -H 'Content-Type: application/json' \
  -d '{"prompt": "A cat astronaut floating in space", "quality": "high", "size": "1024x1024"}'
# Returns 402 with PAYMENT-REQUIRED header (base64 JSON)
# 2. Decode challenge, sign USDC payment, resend with PAYMENT-SIGNATURE header
# 3. Poll GET /api/jobs/{jobId} with SIGN-IN-WITH-X header until complete

Example

Request

{
  "size": "1024x1024",
  "prompt": "A cat astronaut floating in space, photorealistic",
  "quality": "high",
  "background": "opaque",
  "moderation": "auto",
  "output_format": "png"
}

Response

{
  "type": "gpt-image-1.5",
  "jobId": "abc123-def456",
  "status": "pending",
  "success": true
}

Endpoint

URLhttps://stablestudio.dev/api/generate/gpt-image-1.5/generate
Transporthttp
Protocolmpp
CurrencypathUSD

Quality

0.88/ 1.00

Full OpenAPI schema with detailed input/output definitions, clear pricing, comprehensive payment flow documentation, and agents.txt present. The endpoint returned 405 on HEAD/GET probes (expected since it's POST-only), but the OpenAPI spec and guidance docs confirm it is live and well-documented. Minor deduction for no direct 402 challenge captured on this specific endpoint and no dedicated docs page.

Warnings

  • —Probe returned 405 because HEAD/GET were used on a POST-only endpoint; this does not indicate the endpoint is down
  • —Requires a crypto wallet with USDC on Base (eip155:8453) or pathUSD on Tempo to make payments
  • —No dedicated documentation page found (/docs returns 404); all docs are embedded in OpenAPI x-guidance

Citations

Provenance

Indexed frommpp_dev
Enriched2026-04-19 16:48:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/gzwRkR