# FDA Calendar API

> FDA Calendar API is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Retrieves upcoming FDA advisory committee meetings and calendar events from the Federal Register API

## Facts

- Endpoint: POST https://x402.agentutility.ai/fda-calendar-api
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fda-calendar-api-1f2b3eea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sgBK-OLLSOb4xfdo8Psi3

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 fda-calendar-api-1f2b3eea -d '<json body>'
```

Example prompt: Can you pull the upcoming FDA advisory committee meetings from the Federal Register for the next 30 days? I need to see what's on the calendar.

## When to prefer this

Use this endpoint when you need structured, up-to-date FDA advisory committee meeting data sourced directly from the Federal Register without building your own scraper or maintaining a Federal Register API integration. Ideal for pharmaceutical, regulatory, or healthcare agents that need to monitor or report on FDA activity calendars.

## Known failure modes

- No meetings found for the specified date range — returns empty meetings array
- Invalid date parameters cause a 400-level error
- Federal Register API upstream unavailability causes timeout or 5xx error
- Payment not settled in USDC results in x402 payment required response

## How this service works

FDA calendar API / FDA advisory committee meeting tracker / biotech catalyst feed. Same Federal Register-backed handler as fda-calendar, listed for agents monitoring upcoming and recent FDA AdComm notices, docket ids, committee names, and meeting dates.

## Output

A JSON object containing a list of FDA advisory committee meeting records sourced from federalregister.gov, including meeting dates, committee names, and related metadata, along with the total count of results returned.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {
      "limit": {
       "type": "number",
       "description": "Max meetings to return (1-50). Default 25."
      },
      "search": {
       "type": "string",
       "description": "Free-text filter applied to meeting title/committee (case-insensitive substring). Examples: 'vaccine', 'oncology', 'cardiovascular'."
      },
      "upcoming_only": {
       "type": "boolean",
       "description": "If true, return only meetings scheduled in the future (relative to fetched_at). Default false (returns recent + upcoming within the days_back window)."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "source": {
       "type": "string"
      },
      "meetings": {
       "type": "array"
      },
      "returned": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "Federal Register API (federalregister.gov)",
  "meetings": [],
  "returned": 5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fda-calendar-api-1f2b3eea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)