# SYNTHORA US Public Debt Breakdown by Security Type (MSPD)

> SYNTHORA US Public Debt Breakdown by Security Type (MSPD) is a paid API for AI agents from us-treasury-mspd-debt-breakdown.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Retrieves the Monthly Statement of the Public Debt (MSPD) from FiscalData, breaking down total US debt by marketable vs. nonmarketable categories and by security class (Bills, Notes, Bonds, TIPS, FRNs).

## Facts

- Endpoint: POST https://us-treasury-mspd-debt-breakdown.hergertsynthora.com/service
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-us-public-debt-breakdown-by-security-type-mspd-fbc42361
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2KSXixzJxwO4ZHxTfT65v

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 synthora-us-public-debt-breakdown-by-security-type-mspd-fbc42361 -d '<json body>'
```

Example prompt: Pull the latest Monthly Statement of the Public Debt breakdown from FiscalData, sorted by security type, and show me how total US debt splits between marketable securities like Bills, Notes, Bonds, TIPS, and FRNs versus nonmarketable debt.

## When to prefer this

Choose this endpoint when you need structured, pageable, filterable access to US Treasury MSPD debt composition data broken down by security type without requiring an API key. Prefer it over direct FiscalData calls when operating in an x402 micropayment agent context, or when you need a stable proxy with consistent JSON schema for autonomous debt-composition or fixed-income analytics workflows.

## Known failure modes

- Invalid filter syntax returns an error or empty result set
- Invalid sort field name causes a 400-level error or unexpected ordering
- Pagination beyond available pages returns empty result
- FiscalData upstream unavailability causes service timeout or degraded response
- Malformed POST body may return a processing error

## How this service works

Monthly Statement of the Public Debt breaking total US debt into marketable vs nonmarketable and by security class (Bills, Notes, Bonds, TIPS, FRNs) from FiscalData (keyless JSON). Serves autonomous debt-composition agents and agent-to-agent fixed-income analytics on the US debt stack. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.

## Output

Returns a JSON object with ok:true and a result object containing MSPD data from FiscalData, including total US public debt broken down into marketable categories (Bills, Notes, Bonds, TIPS, FRNs) and nonmarketable categories, filterable and sortable by security class, date, and outstanding amounts.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "page": {
   "type": "string",
   "description": "page"
  },
  "sort": {
   "type": "string",
   "description": "sort"
  },
  "filter": {
   "type": "string",
   "description": "filter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "us-treasury-mspd-debt-breakdown",
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-us-public-debt-breakdown-by-security-type-mspd-fbc42361/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from us-treasury-mspd-debt-breakdown.hergertsynthora.com](https://www.zero.xyz/host/us-treasury-mspd-debt-breakdown.hergertsynthora.com/llms.txt)