# Saylor Innovations Guide Library: Agent Tool-Call Loop Detection

> Saylor Innovations Guide Library: Agent Tool-Call Loop Detection is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Returns a knowledge guide on detecting and stopping AI agent tool-call loops, covering repeated-call detection, step/cost budgets, duplicate-call guards, and error escalation strategies.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/kb/agent-tool-call-loops?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-guide-library-agent-tool-call-loop-detection-f8ba2a1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TxlvMBthXGsRq9g4CR9ov

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-guide-library-agent-tool-call-loop-detection-f8ba2a1d
```

Example prompt: Can you pull up the Saylor Innovations guide on stopping AI agents stuck in tool-call loops — I need advice on detecting repeated calls, setting step and cost budgets, using duplicate-call guards, and escalating errors properly?

## When to prefer this

Choose this endpoint when an AI agent or developer needs structured, authoritative guidance specifically on breaking tool-call loops, enforcing step/cost budgets, and implementing duplicate-call guards in agentic systems. Prefer it over general web searches when you want a curated, structured knowledge article rather than raw search results.

## Known failure modes

- Payment not provided or insufficient — endpoint requires $0.01 USDC via x402 protocol
- Network or server error returning non-200 status
- Guide content unavailable or empty body returned
- Malformed JSON response if upstream knowledge base is unreachable

## How this service works

Stop an AI agent stuck in a tool-call loop - detect repeated calls, step and cost budgets, duplicate-call guards, error escalation

## Output

A JSON object containing the guide's unique identifier, title, category, and full body text covering strategies for detecting repeated tool calls, enforcing step and cost budgets, implementing duplicate-call guards, and escalating errors when an AI agent is stuck in a loop. May also include a price and license identifier.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "id",
      "t",
      "c",
      "body"
     ],
     "properties": {
      "c": {
       "type": "string",
       "description": "Category of the guide"
      },
      "t": {
       "type": "string",
       "description": "Title of the guide"
      },
      "id": {
       "type": "string",
       "description": "Identifier of the record"
      },
      "body": {
       "type": "string",
       "description": "Main body text"
      },
      "price": {
       "type": [
        "number",
        "null"
       ],
       "description": "Price"
      },
      "license": {
       "type": "string",
       "description": "License identifier"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-guide-library-agent-tool-call-loop-detection-f8ba2a1d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)