api.onesource.io
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Backing-ratio history, joined against circulating supply as of each snapshot block. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
OtherLiveeip155:8453Exactvia cdp
Calls · 30d
16
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far.
$20.97
Verified settled volume
A floor: summed over 5,000 of up to 90,636 indexed settlements. The exact verified count is not computed for a wallet this size.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
19
Calls · 30d
Upstream's own call count for this endpoint, not ours.
19
Unique payers · 30d
Last called 2026-09-24 07:42Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3eaThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"meta": {
"network": "eip155:8453",
"endpoint": "/v1/backing/history",
"cost_usdc": "0.02"
},
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"credentialTypes": [
"authorization"
]
},
"payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 3600
}
],
"resource": {
"url": "https://api.onesource.io/standard/v1/backing/history",
"mimeType": "application/json",
"description": "The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Backing-ratio history, joined against circulating supply as of each snapshot block. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hours": 24
}
},
"output": {
"type": "json",
"example": {
"basis": "backing_history",
"history": [
{
"ts": "2026-09-14T12:00:00Z",
"basis": "measured",
"block": 63800000,
"pol_eth_raw": null,
"pol_std_raw": null,
"circulating_raw": "500000000000000000000000",
"expansion_eth_raw": "18000000000000000000",
"contraction_eth_raw": "9000000000000000000",
"eth_backing_per_standard_excluding_pol_raw": "0.000054"
}
],
"network": "robinhood",
"chain_id": 4663,
"lag_blocks": 5,
"as_of_block": 63824000,
"serving_state": "fresh"
}
}
},
"schema": {
"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": {
"hours": {
"type": "integer",
"minimum": 1
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"basis": {
"type": "string"
},
"history": {
"type": "array",
"items": {
"type": "object",
"properties": {
"ts": {
"type": "string"
},
"basis": {
"type": "string"
},
"block": {
"type": "integer"
},
"pol_eth_raw": {
"type": [
"string",
"null"
]
},
"pol_std_raw": {
"type": [
"string",
"null"
]
},
"circulating_raw": {
"type": "string"
},
"expansion_eth_raw": {
"type": "string"
},
"contraction_eth_raw": {
"type": "string"
},
"eth_backing_per_standard_excluding_pol_raw": {
"type": "string"
}
}
}
},
"network": {
"type": "string"
},
"chain_id": {
"type": "integer"
},
"lag_blocks": {
"type": "integer"
},
"as_of_block": {
"type": "integer"
},
"serving_state": {
"type": "string"
}
},
"description": "Endpoint-specific response payload"
}
}
}
}
}
}
},
"x402Version": 2,
"payment_rails": [
{
"rail": "x402",
"chain": "eip155:8453",
"assets": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea"
},
{
"rail": "mpp",
"chain": "tempo:4217",
"assets": [
"0x20c000000000000000000000b9537d11c60e8b50",
"0x20c0000000000000000000000000000000000000"
],
"recipient": "0x19B8e99079A5558ff4460357b0a78e14a7F600B7"
}
],
"api_key_subscription": {
"url": "https://onesource.io/rest-api#pricing",
"description": "Alternative to paying per call: a flat-rate monthly subscription authenticated with `Authorization: Bearer <key>`. No wallet, stablecoin, or on-chain settlement required. Use this if the client cannot custody a private key, if billing must be invoiced, or if per-call pricing costs more than a flat fee at your volume."
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x52E2…1f3ea. The signed payment is good for 1 hour.
- Paid to
- 0x52E2…1f3ea
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 hour
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"credentialTypes": [
"authorization"
]
},
"payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 3600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hours": 24
}
},
"output": {
"type": "json",
"example": {
"basis": "backing_history",
"history": [
{
"ts": "2026-09-14T12:00:00Z",
"basis": "measured",
"block": 63800000,
"pol_eth_raw": null,
"pol_std_raw": null,
"circulating_raw": "500000000000000000000000",
"expansion_eth_raw": "18000000000000000000",
"contraction_eth_raw": "9000000000000000000",
"eth_backing_per_standard_excluding_pol": "0.000054"
}
],
"network": "robinhood",
"chain_id": 4663,
"lag_blocks": 5,
"as_of_block": 63824000,
"serving_state": "fresh"
}
}
},
"schema": {
"type": "object",
"$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": {
"hours": {
"type": "integer",
"minimum": 1
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"basis": {
"type": "string"
},
"history": {
"type": "array",
"items": {
"type": "object",
"properties": {
"ts": {
"type": "string"
},
"basis": {
"type": "string"
},
"block": {
"type": "integer"
},
"pol_eth_raw": {
"type": [
"string",
"null"
]
},
"pol_std_raw": {
"type": [
"string",
"null"
]
},
"circulating_raw": {
"type": "string"
},
"expansion_eth_raw": {
"type": "string"
},
"contraction_eth_raw": {
"type": "string"
},
"eth_backing_per_standard_excluding_pol": {
"type": "string"
}
}
}
},
"network": {
"type": "string"
},
"chain_id": {
"type": "integer"
},
"lag_blocks": {
"type": "integer"
},
"as_of_block": {
"type": "integer"
},
"serving_state": {
"type": "string"
}
},
"description": "Endpoint-specific response payload"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-24 07:42Z
- Last indexed by Roundhouse
- 2026-09-24 13:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-17 14:15Z
- x402 version
- 2
- Max timeout
- 3600s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.onesource.io and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.onesource.io' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.onesource.io/standard/v1/backing/history, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.