# Saylor Innovations Guide Library — Agent Capability Registry

> Saylor Innovations Guide Library — Agent Capability Registry is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Retrieves the agent capability registry and discovery guide for AI agents and agentic workflows from Saylor Innovations' knowledge base.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/kb/agent-capability-registry?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-guide-library-agent-capability-registry-71fddfbf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ls7Wg5DJlMmPOF8PAvHiL

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-capability-registry-71fddfbf
```

Example prompt: Can you pull up the Saylor Innovations agent capability registry guide so I can see what AI and agent capabilities are listed there?

## When to prefer this

Choose this endpoint when you need to programmatically discover or browse the Saylor Innovations AI agent capability registry, especially in agentic workflows that need to self-discover available tools. Useful for bootstrapping agent capability awareness or auditing what services are registered on this platform. Prefer over generic web searches when you specifically need the structured knowledge base entry from Saylor Innovations.

## Known failure modes

- Payment not included or insufficient (402 Payment Required — $0.01 USDC required per call)
- Invalid or missing required input fields (400 Bad Request)
- Endpoint temporarily unavailable (503 Service Unavailable)
- Content not found or registry empty (404 Not Found)
- Rate limiting if too many requests are sent in quick succession

## How this service works

Agent Capability Registry and Discovery — AI & Agents

## Output

Returns a JSON object containing a knowledge base entry with fields including: an entry ID, a timestamp (t), a content type identifier (c), the body text of the capability registry/guide article, an optional price, and a license field. The body likely contains descriptive or structured information about available AI agent capabilities.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "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"
      },
      "t": {
       "type": "string"
      },
      "id": {
       "type": "string"
      },
      "body": {
       "type": "string"
      },
      "price": {
       "type": [
        "number",
        "null"
       ]
      },
      "license": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-guide-library-agent-capability-registry-71fddfbf/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)