s2ar
starlens, by s2ar: certified image compression for vision-LLMs. Cut vision tokens with a sealed per-model certificate that the answer survived.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.005 USDC on Base to 0x2c49…b5452. The signed payment is good for 1 minute.
- Paid to
- 0x2c49…b5452
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2c4938626788e8e4fd803bfd1353eca64c1b5452",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"ref": "14.1.1",
"file": "crates/core/flags/defs.rs",
"repo": "BurntSushi/ripgrep",
"symbol": "Glob as Flag"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"ref": "14.1.1",
"repo": "https://github.com/BurntSushi/ripgrep",
"text": "impl Glob as Flag (crates/core/flags/defs.rs, lines 2459-2512)\n…",
"receipt": {
"what": "…",
"charter": "https://api.s2ar.dev/charter",
"cost_usd": 0.005,
"issued_at": "2026-10-10T00:00:00Z",
"witnesses": [
"sym"
],
"determinism": "replayable",
"refund_rule": "failed calls are never charged",
"evidence_hash": "sha256:94abfed2…"
},
"tokens_est": 565,
"charged_usd": 0.005
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"required": [
"repo",
"file",
"symbol"
],
"properties": {
"ref": {
"type": "string",
"description": "branch, tag or commit; the default branch when omitted"
},
"file": {
"type": "string",
"description": "path inside the repository"
},
"repo": {
"type": "string",
"description": "a public GitHub, GitLab or Codeberg repository: owner/repo, github.com/owner/repo or its https URL"
},
"symbol": {
"type": "string",
"description": "a name as sym ls lists it"
}
},
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-10 19:38Z
- Last indexed by Roundhouse
- 2026-10-16 12:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-10 00:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 405
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. 13 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 s2ar 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=s2ar' 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.s2ar.dev/x402/v1/sym/read, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.