# OneSource Standard Reserve Supply Ledger

> OneSource Standard Reserve Supply Ledger is a paid API for AI agents from api.onesource.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-16).

Returns the current on-chain supply snapshot for The Standard Reserve (TSR) token on Robinhood Chain, including cumulative minted, burned, circulating, and max supply figures.

## Facts

- Endpoint: GET https://api.onesource.io/standard/v1/supply/current?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/onesource-standard-reserve-supply-ledger-f10aa37a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6BWSaWw5o_-E_2-xUTIVe

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 onesource-standard-reserve-supply-ledger-f10aa37a
```

Example prompt: What is the current circulating supply of TSR on Robinhood Chain, and how many tokens have been minted and burned in total so far?

## When to prefer this

Use this endpoint when you need the authoritative current on-chain supply state for The Standard Reserve (TSR) token on Robinhood Chain, including granular burn category breakdowns (fees, buybacks, licenses). Prefer this over general blockchain explorers when you need a structured, agent-ready response without parsing raw chain data yourself. Ideal for supply monitoring, DeFi analytics, reserve protocol auditing, and circulating supply dashboards.

## Known failure modes

- Payment not provided or insufficient — returns 402 Payment Required
- Robinhood Chain node lag may cause stale data indicated by lag_blocks value
- serving_state field may indicate degraded or unavailable state
- Network or chain RPC errors may result in 5xx responses
- No query parameters supported — any passed parameters are ignored

## How this service works

The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Latest supply ledger: cumulative minted and burned totals, circulating supply, and max supply. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.

## Output

Returns a JSON object with the current TSR supply state including: timestamp (ts), network name, chain_id, as_of_block, lag_blocks, serving_state, minted_cum_raw (cumulative minted), burned_cum_raw (cumulative burned), circulating_raw (circulating supply), max_supply_raw, burned_fees_cum_raw, burned_buybacks_cum_raw, burned_licenses_cum_raw, minted_as_of_block, and basis. All token amounts are returned as raw integer strings.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ts": "2026-09-15T03:00:00Z",
  "basis": "measured",
  "network": "robinhood",
  "chain_id": 4663,
  "lag_blocks": 4,
  "as_of_block": 63499000,
  "serving_state": "fresh",
  "burned_cum_raw": "862000000000000000000000",
  "max_supply_raw": "10000000000000000000000000",
  "minted_cum_raw": "5062000000000000000000000",
  "circulating_raw": "4200000000000000000000000",
  "minted_as_of_block": 63499000,
  "burned_fees_cum_raw": "62000000000000000000000",
  "burned_buybacks_cum_raw": "300000000000000000000000",
  "burned_licenses_cum_raw": "500000000000000000000000"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onesource-standard-reserve-supply-ledger-f10aa37a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.onesource.io](https://www.zero.xyz/host/api.onesource.io/llms.txt)