# TruthBear Stablecoin Census Record

> TruthBear Stablecoin Census Record is a paid API for AI agents from api.truthbear.co, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns a comprehensive census record for a single stablecoin by symbol, including market cap, price, depeg state, lifecycle data, and time series, each with a cryptographic record hash.

## Facts

- Endpoint: GET https://api.truthbear.co/stable/coin
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/truthbear-stablecoin-census-record-126480c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tKkv_6HszNqIK87fr2J7v

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 truthbear-stablecoin-census-record-126480c5
```

Example prompt: Pull the TruthBear census record for the USDC stablecoin — I need its current price, market cap, depeg state, and the record hash so I can verify the data.

## When to prefer this

Choose this endpoint when you need verifiable, hash-attested stablecoin data — especially price, market cap, depeg status, and lifecycle — for a single stablecoin by symbol. Ideal for compliance, auditing, or agent workflows requiring cryptographic proof of data integrity. Use /stable/preview first to discover available sample_ids. Prefer this over generic crypto price APIs when you need depeg state signals and record hashes rather than raw price feeds alone.

## Known failure modes

- 422 no_charge: no data available for the requested stablecoin symbol — call is not billed
- Invalid or misspelled symbol returns no data
- Symbol not in TruthBear's covered stablecoin universe results in empty response

## How this service works

[SIGNAL+PROOF] Census record for one stablecoin (?symbol=): market cap, price, depeg state, lifecycle and time series, each with record_hash. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.01 per call.

## Output

A JSON object containing the stablecoin's market cap, price, depeg state, lifecycle status, and time series data points — each accompanied by a cryptographic record_hash for verification. Returns a 422 no_charge error (not billed) if no data is available for the requested symbol.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "examples": [
        "basis-cash-bac"
       ],
       "description": "required - stablecoin symbol; samples at free /stable/preview (sample_ids)"
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "entity": "basis-cash-bac",
  "current": {
   "state": "dead",
   "ongoing": false,
   "death_type": "depeg-abandoned",
   "lifespan_days": 152
  },
  "lifecycle": {
   "peg": "usd",
   "state": "dead",
   "end_at": "2021-05-01",
   "issuer": "Basis Cash (anon)",
   "context": "The algorithmic stablecoin BAC traded below USD 1 for a long period and never regained its peg; after the seigniorage...",
   "ongoing": false,
   "birth_at": "2020-11-30",
   "mechanism": "algorithmic",
   "death_type": "depeg-abandoned",
   "lifespan_days": 152
  },
  "signal_id": "stablecoin.lifecycle",
  "source_ref": "https://www.coingecko.com/en/coins/basis-cash",
  "entity_name": "Basis Cash (BAC)",
  "observed_at": "2026-08-24T15:00:00.121Z",
  "record_hash": "sha256:664da5b5c8cc399928a3149a49732e15d67f66d69b683e1469c0ab9871d8d702",
  "source_tier": "T1",
  "snapshot_date": "2026-08-24",
  "data_age_hours": 0,
  "hash_core_version": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/truthbear-stablecoin-census-record-126480c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.truthbear.co](https://www.zero.xyz/host/api.truthbear.co/llms.txt)