# Best pay-per-call APIs to summarize text for AI agents (September 2026)

> Zero indexes 13 pay-per-call services that summarize text. Of the 10 ranked here, 9 answered a live probe in the last 7 days. Quoted prices run from $0.001 to $0.054 per call, median $0.01, paid per call over x402 with no API key. The three with real agent usage in the last 30 days are AgentReader Summarize, AgentPay Summarize, Quartermaster Webpage Summarizer. The cheapest live option is GPT-5.5 Text Summarization Tool at $0.0029.

Canonical page: https://www.zero.xyz/use-cases/summarize-text
Ranked by evidence from Zero's own probes and real agent calls. Updated Sep 29, 2026. 8 agents searched Zero for this in the last 90 days.

## Ranked services

| # | Service | Host | Price | Rail | Live | Calls 30d | Reviews |
|---|---|---|---|---|---|---|---|
| 1 | [AgentReader Summarize](https://www.zero.xyz/c/agentreader-summarize-69750a9b/llms.txt) | agentreader.dev | $0.02 | x402 | yes (Sep 30, 2026) | 4 | — |
| 2 | [AgentPay Summarize — Pay-per-Call Text Summarization via x402](https://www.zero.xyz/c/agentpay-summarize-pay-per-call-text-summarization-via-x402-d9b45559/llms.txt) | agentpay.help | $0.01 | x402 | yes (Oct 1, 2026) | 3 | — |
| 3 | [Quartermaster Webpage Summarizer](https://www.zero.xyz/c/quartermaster-webpage-summarizer-1d2c251b/llms.txt) | quartermaster.surewhynot.app | $0.01 | x402 | yes (Sep 30, 2026) | 1 | — |
| 4 | [GPT-5.5 Text Summarization Tool (x402)](https://www.zero.xyz/c/gpt-5-5-text-summarization-tool-x402-0d3abb90/llms.txt) | gpt55.558686.xyz | $0.0029 | x402 | yes (Oct 1, 2026) | 0 | — |
| 5 | [x402 APIs - Text Summarization](https://www.zero.xyz/c/x402-apis-text-summarization-b6800683/llms.txt) | x402-apis-eta.vercel.app | $0.01 | x402 | yes (Sep 29, 2026) | 0 | — |
| 6 | [clawtious.creatormagic.ai AI Text Summarization](https://www.zero.xyz/c/clawtious-creatormagic-ai-b5ec4a12/llms.txt) | clawtious.creatormagic.ai | $0.001 | x402 | not verified | 0 | — |
| 7 | [api.strale.io Text Summarizer](https://www.zero.xyz/c/api-strale-io-912c4911/llms.txt) | api.strale.io | $0.054 | x402 | yes (Sep 30, 2026) | 0 | — |
| 8 | [anchor-x402 TL;DR Summarizer](https://www.zero.xyz/c/api-anchor-x402-com-cc2534b3/llms.txt) | api.anchor-x402.com | $0.01 | x402 | yes (Sep 29, 2026) | 0 | — |
| 9 | [x402node Text Summarizer](https://www.zero.xyz/c/x402node-text-summarizer-d8203bc4/llms.txt) | api.x402node.dev | $0.005 | x402 | yes (Oct 1, 2026) | 0 | — |
| 10 | [Orbonomy LLM Summarize](https://www.zero.xyz/c/orbonomy-llm-summarize-9aed4e5d/llms.txt) | main.orbonomy.xyz | $0.05 | x402 | yes (Oct 1, 2026) | 0 | — |

## Call one from an agent

```
zero fetch --capability agentreader-summarize-69750a9b --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.

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