# US Treasury Marketable Debt Outstanding (MSPD Summary)

> US Treasury Marketable Debt Outstanding (MSPD Summary) is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.07/call, status unknown (last checked 2026-09-16).

Returns the Monthly Statement of the Public Debt summary table showing outstanding marketable Treasury securities by class, split between debt held by the public and intragovernmental holdings, sorted newest first.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-fiscal-marketable-debt-outstanding
- Price: $0.07/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-treasury-marketable-debt-outstanding-mspd-summary-661aba98
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rOu-1SpRe8abvE4dvy1Re

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 us-treasury-marketable-debt-outstanding-mspd-summary-661aba98 -d '<json body>'
```

Example prompt: Pull the latest Monthly Statement of the Public Debt summary from US Treasury FiscalData showing all classes of marketable securities outstanding, split between debt held by the public and intragovernmental holdings.

## When to prefer this

Choose this endpoint when you need structured, up-to-date US Treasury marketable debt outstanding data broken down by security class and holder type (public vs intragovernmental), without needing to authenticate directly with the US Treasury FiscalData API. Ideal for agents that need fiscal macro data in a pay-per-call model without API key management.

## Known failure modes

- Empty or malformed request body may cause a 400 error
- US Treasury FiscalData upstream unavailability may result in a 503 or degraded response
- Payment of $0.07 USDC not provided or rejected via x402 protocol returns a 402 Payment Required
- Rate limiting or proxy timeout may return a 429 or 504 error

## How this service works

Monthly Statement of the Public Debt (MSPD) summary table: amounts of marketable Treasury securities outstanding by class, split into debt held by the public vs intragovernmental holdings. Source: US Treasury FiscalData. Sorted newest first.

## Output

A table of the most recent Monthly Statement of the Public Debt (MSPD) entries, sorted newest first, with rows covering marketable Treasury security classes (e.g. Treasury bills, notes, bonds, TIPS, FRNs) and columns distinguishing amounts held by the public from intragovernmental holdings, sourced from US Treasury FiscalData.

## 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": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-treasury-marketable-debt-outstanding-mspd-summary-661aba98/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)