# StablecoinPulse Reserve Attestation Check

> StablecoinPulse Reserve Attestation Check is a paid API for AI agents from stablecoinpulse.theaslangroupllc.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-13).

Checks reserve-attestation freshness and composition for a named stablecoin issuer, flagging loudly when no recent attestation is found and citing reserve composition to disclosed sources.

## Facts

- Endpoint: GET https://stablecoinpulse.theaslangroupllc.com/api/reserve-check
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablecoinpulse-reserve-attestation-check-17e881df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6yiqswC5XhT3ECbS9jZxO

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 stablecoinpulse-reserve-attestation-check-17e881df
```

Example prompt: Can you check the reserve attestation for Tether — is it up to date, and what does their reserve composition look like right now? Flag it if the attestation is stale.

## When to prefer this

Use this endpoint when you need to verify whether a specific stablecoin issuer has published a recent reserve attestation and what assets back their token. Prefer this over generic market dashboards when the core concern is reserve transparency, audit freshness, or detecting undisclosed composition changes for a single named issuer.

## Known failure modes

- Unknown or unsupported issuer name — returns error indicating the issuer is not tracked
- Attestation data unavailable — returns staleness flag with null attestation date
- Source document not publicly accessible — composition returned without full source citation
- Rate limiting or payment failure — 402 or 429 response if payment is insufficient or request quota exceeded

## How this service works

Reserve-attestation freshness and composition check for a named stablecoin issuer — loud staleness flag when no recent attestation date can be found, reserve composition cited to source where disclosed.

## Output

Returns the most recent attestation date for the named stablecoin issuer, a staleness flag if no recent attestation can be found, a breakdown of reserve composition (e.g. Treasuries, cash equivalents, commercial paper), and citations to the source documents where the composition was disclosed.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "lang": {
       "type": "string",
       "description": "e.g. en, es, fr, de, ja, zh, ko, pt, ar (default: en; forwarded to the model, not strictly validated)"
      },
      "issuer": {
       "type": "string",
       "description": "Issuer name, e.g. Tether | Circle | Paxos (one of issuer or stablecoin required)"
      },
      "stablecoin": {
       "type": "string",
       "description": "Stablecoin ticker, e.g. USDT | USDC (one of issuer or stablecoin required)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "errors": {
     "type": "object",
     "description": "Documented error responses, keyed by HTTP status code",
     "additionalProperties": {
      "type": "object",
      "required": [
       "description"
      ],
      "properties": {
       "example": {
        "type": "object"
       },
       "description": {
        "type": "string"
       }
      }
     }
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "issuer": "Tether",
  "stablecoin": "USDT",
  "attestation_freshness": {
   "days_since": 52,
   "stale_flag": "aging",
   "latest_date_found": "2026-05-15"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablecoinpulse-reserve-attestation-check-17e881df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stablecoinpulse.theaslangroupllc.com](https://www.zero.xyz/host/stablecoinpulse.theaslangroupllc.com/llms.txt)