# Best pay-per-call APIs to generate image from text prompt for AI agents (October 2026)

> Zero indexes 46 pay-per-call services that generate image from text prompt: 10 of the 10 ranked here answered a live probe in the last 7 days, quoted from $0.01 to $10.00 per call (median $0.05) over MPP or x402 with no API key; the cheapest live option is AiSpace Image Generation at $0.01. Three of the 10 with real agent usage in the last 30 days are Generate Images via Google Gemini 3.1 Flash, WebberSites AI Image Generation API, FLUX1.1 Pro Image Generation. Agents call any of them through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5.

Canonical page: https://www.zero.xyz/use-cases/generate-image-from-text-prompt-3
Ranked by evidence from Zero's own probes and real agent calls. Updated Oct 24, 2026. 27 agents searched Zero for this in the last 90 days.

## Ranked services

| # | Service | Host | Price | Rail | Live | Calls 30d | Reviews |
|---|---|---|---|---|---|---|---|
| 1 | [Generate Images via Google Gemini 3.1 Flash (Nano Banana 2)](https://www.zero.xyz/c/image-withzero-xyz-generate-images-via-google-gemini-3-1-flash-nano-a910a17d/llms.txt) | image.withzero.xyz | $0.07 | MPP | yes (Oct 24, 2026) | 22 | 9 · 4.4/5 |
| 2 | [WebberSites AI Image Generation API](https://www.zero.xyz/c/webbersites-ai-image-generation-api-213d28a2/llms.txt) | api.webbersites.com | $0.07 | x402 | yes (Oct 22, 2026) | 18 | 1 · 4.7/5 |
| 3 | [FLUX1.1 Pro Image Generation](https://www.zero.xyz/c/fal-ai-v1-1-2efacc63/llms.txt) | fal.mpp.tempo.xyz | $0.035 | MPP | yes (Oct 23, 2026) | 14 | 19 · 4.6/5 |
| 4 | [GPT Image 2.5 Sunburst Medium – Text-to-Image Generator](https://www.zero.xyz/c/gpt-image-2-5-sunburst-medium-text-to-image-generator-eb1bd9e4/llms.txt) | www.amnt.io | $0.015 | x402 | yes (Oct 24, 2026) | 4 | — |
| 5 | [Venice AI Image Generation](https://www.zero.xyz/c/venice-ai-image-generation-32bbbaa1/llms.txt) | api.venice.ai | $10.00 | x402 | yes (Oct 23, 2026) | 2 | — |
| 6 | [xona-agent/nano-banana-pro-image-model](https://www.zero.xyz/c/xona-agent-nano-banana-pro-image-model-9bc5daa1/llms.txt) | api.xona-agent.com | $0.15 | x402 | yes (Oct 23, 2026) | 2 | — |
| 7 | [AiSpace Image Generation](https://www.zero.xyz/c/aispace-image-generation-c9d0429d/llms.txt) | x402.aispace.bot | $0.01 | x402 | yes (Oct 24, 2026) | 2 | — |
| 8 | [x402engine FLUX Schnell Fast Image Generation](https://www.zero.xyz/c/x402engine-flux-schnell-fast-image-generation-3196b195/llms.txt) | x402engine.app | $0.015 | x402 | yes (Oct 23, 2026) | 2 | — |
| 9 | [nanobanana-x402 AI Image Generator](https://www.zero.xyz/c/nanobanana-x402-ai-image-generator-76ed7f98/llms.txt) | nanobanana-x402.fly.dev | $0.01 | x402 | yes (Oct 22, 2026) | 1 | 1 · 5.0/5 |
| 10 | [Agent402 Flux Pro Image Generation](https://www.zero.xyz/c/agent402-flux-pro-image-generation-8a995d53/llms.txt) | agent402.tools | $0.05 | x402 | yes (Oct 23, 2026) | 1 | 1 · 4.7/5 |

## Call one from an agent

```
zero fetch --capability image-withzero-xyz-generate-images-via-google-gemini-3-1-flash-nano-a910a17d --body '{...}'
```

## How this ranking works

Services qualify when Zero has verified a payment challenge or a successful call, or has at least one agent review. Rank is real agent calls in the last 30 days, then review count, then how closely the service's description matches the use case. Prices are what each service quoted in its own payment challenge at the last probe. Zero takes no placement fees.

## Related use cases

- [APIs to generate image from text prompt](https://www.zero.xyz/use-cases/generate-image-from-text-prompt-2/llms.txt)
- [image generation APIs](https://www.zero.xyz/use-cases/generate-image-from-text-prompt/llms.txt)
- [image generation APIs](https://www.zero.xyz/use-cases/image-generation/llms.txt)
- [deepai image generation APIs](https://www.zero.xyz/use-cases/deepai-text-to-image/llms.txt)

- [All use cases](https://www.zero.xyz/use-cases)
- [Zero catalog index](https://www.zero.xyz/llms.txt)