Roundhouse

agent-exec.448c.org

Accountless, pay-per-use code execution for software agents: submit source code, get stdout, stderr and exit code back from an isolated, network-less sandbox. No account, no API key -- possession of valid payment is sufficient.

OtherLiveeip155:8453Exactvia wellknown:agent-exec.45.67.221.128.sslip.io
https://agent-exec.448c.org/listing
Settlements · 30d
24↓ 33%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
—
Verified settled volume
0 settlements proven x402 by their on-chain EIP-3009 marker.
$0.250
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xc8Fceb0F3611BE99c41586eA2B83F6A0911d2Ff0

The 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.

{
  "error": "GET is not payable on this route; retry as POST with your X-PAYMENT header.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xc8Fceb0F3611BE99c41586eA2B83F6A0911d2Ff0",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://agent-exec.448c.org/listing",
      "description": "POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "id": {
              "type": "string",
              "required": false,
              "description": "the id of an order you already own, to extend it by another 90 days of rechecks. Exactly one of url or id."
            },
            "url": {
              "type": "string",
              "required": false,
              "description": "the absolute http(s) URL of YOUR service, at most 512 bytes -- the one a venue should list. Omit it to extend an order instead."
            }
          },
          "discoverable": false
        },
        "output": {
          "type": "json",
          "example": {
            "id": "1b4e28ba-2fa1-11d2-883f-0016d3cca427",
            "url": "https://your-service.example",
            "owner": "0x0000000000000000000000000000000000dEaD",
            "venues": [
              {
                "lane": "on-behalf",
                "name": "example-registry",
                "state": "queued",
                "venue": 2,
                "reason": null,
                "evidence": null,
                "checkedAt": null
              }
            ],
            "outcome": "created",
            "payment": {
              "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "payer": "0x0000000000000000000000000000000000dEaD",
              "amount": "250000",
              "network": "base",
              "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000"
            },
            "expiresAt": "2027-01-08T00:00:00.000Z"
          }
        }
      },
      "maxAmountRequired": "250000",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "HzUdRhSZMrSg5sbPCjToWFGCkSf2yfSE33m5NWaBC4rh"
      },
      "payTo": "GPbCdSaF5Qcfr5kdundH3etood2q5rafnRwdvVrs3Tan",
      "scheme": "exact",
      "network": "solana",
      "mimeType": "application/json",
      "resource": "https://agent-exec.448c.org/listing",
      "description": "POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "id": {
              "type": "string",
              "required": false,
              "description": "the id of an order you already own, to extend it by another 90 days of rechecks. Exactly one of url or id."
            },
            "url": {
              "type": "string",
              "required": false,
              "description": "the absolute http(s) URL of YOUR service, at most 512 bytes -- the one a venue should list. Omit it to extend an order instead."
            }
          },
          "discoverable": false
        },
        "output": {
          "type": "json",
          "example": {
            "id": "1b4e28ba-2fa1-11d2-883f-0016d3cca427",
            "url": "https://your-service.example",
            "owner": "0x0000000000000000000000000000000000dEaD",
            "venues": [
              {
                "lane": "on-behalf",
                "name": "example-registry",
                "state": "queued",
                "venue": 2,
                "reason": null,
                "evidence": null,
                "checkedAt": null
              }
            ],
            "outcome": "created",
            "payment": {
              "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "payer": "0x0000000000000000000000000000000000dEaD",
              "amount": "250000",
              "network": "base",
              "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000"
            },
            "expiresAt": "2027-01-08T00:00:00.000Z"
          }
        }
      },
      "maxAmountRequired": "250000",
      "maxTimeoutSeconds": 60
    }
  ],
  "feedback": "Complaints, questions, quote requests, or a service you wish we had: POST https://agent-exec.448c.org/feedback -- free, no account. Every report is read and analysed daily; there is no individual reply.",
  "x402Version": 1
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.25USDC≈ $0.25 USD
on Base · exact scheme

Pay 0.25 USDC on Base to 0xc8Fc…d2Ff0. The signed payment is good for 1 minute.

Paid to
0xc8Fc…d2Ff0
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
250000 smallest units
Buys
POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.
Returns
application/json
250000units
on solana · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
GPbCdS…s3Tan
Token contract
EPjFWd…TDt1v
Payment window
1 minute
Buys
POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc8Fceb0F3611BE99c41586eA2B83F6A0911d2Ff0",
    "scheme": "exact",
    "network": "base",
    "mimeType": "application/json",
    "resource": "https://agent-exec.448c.org/listing",
    "description": "POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.",
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "bodyFields": {
          "id": {
            "type": "string",
            "required": false,
            "description": "the id of an order you already own, to extend it by another 90 days of rechecks. Exactly one of url or id."
          },
          "url": {
            "type": "string",
            "required": false,
            "description": "the absolute http(s) URL of YOUR service, at most 512 bytes -- the one a venue should list. Omit it to extend an order instead."
          }
        },
        "discoverable": true
      },
      "output": {
        "type": "json",
        "example": {
          "id": "1b4e28ba-2fa1-11d2-883f-0016d3cca427",
          "url": "https://your-service.example",
          "owner": "0x0000000000000000000000000000000000dEaD",
          "venues": [
            {
              "lane": "on-behalf",
              "name": "example-registry",
              "state": "queued",
              "venue": 2,
              "reason": null,
              "evidence": null,
              "checkedAt": null
            }
          ],
          "outcome": "created",
          "payment": {
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "payer": "0x0000000000000000000000000000000000dEaD",
            "amount": "250000",
            "network": "base",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000"
          },
          "expiresAt": "2027-01-08T00:00:00.000Z"
        }
      }
    },
    "maxAmountRequired": "250000",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "HzUdRhSZMrSg5sbPCjToWFGCkSf2yfSE33m5NWaBC4rh"
    },
    "payTo": "GPbCdSaF5Qcfr5kdundH3etood2q5rafnRwdvVrs3Tan",
    "scheme": "exact",
    "network": "solana",
    "mimeType": "application/json",
    "resource": "https://agent-exec.448c.org/listing",
    "description": "POST /listing -- Order a listing campaign for your service across every permissionless agent venue we know: each venue classified, submitted to wherever we have a submitter for it, and each entry proven in the catalogue by reading it back, weekly for 90 days. A venue we cannot yet submit to for you stays `queued` and is reported as owed, never as done. The paying wallet owns the order, readable owner-signed at /listing/{id}. Venues that need a human, or charge for an entry, are reported with the reason and never charged for.",
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "bodyFields": {
          "id": {
            "type": "string",
            "required": false,
            "description": "the id of an order you already own, to extend it by another 90 days of rechecks. Exactly one of url or id."
          },
          "url": {
            "type": "string",
            "required": false,
            "description": "the absolute http(s) URL of YOUR service, at most 512 bytes -- the one a venue should list. Omit it to extend an order instead."
          }
        },
        "discoverable": true
      },
      "output": {
        "type": "json",
        "example": {
          "id": "1b4e28ba-2fa1-11d2-883f-0016d3cca427",
          "url": "https://your-service.example",
          "owner": "0x0000000000000000000000000000000000dEaD",
          "venues": [
            {
              "lane": "on-behalf",
              "name": "example-registry",
              "state": "queued",
              "venue": 2,
              "reason": null,
              "evidence": null,
              "checkedAt": null
            }
          ],
          "outcome": "created",
          "payment": {
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "payer": "0x0000000000000000000000000000000000dEaD",
            "amount": "250000",
            "network": "base",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000"
          },
          "expiresAt": "2027-01-08T00:00:00.000Z"
        }
      }
    },
    "maxAmountRequired": "250000",
    "maxTimeoutSeconds": 60
  }
]

Provenance

Seen in the source catalog
—
Last indexed by Roundhouse
2026-10-14 20:46Z
Last enriched (probe, favicon, geo)
2026-10-14 21:15Z
x402 version
1
Max timeout
60s
Liveness probe
HTTP 402
Report

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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service agent-exec.448c.org 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=agent-exec.448c.org'
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://agent-exec.448c.org/listing, 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.