Roundhouse

x402.thefirstwall.ai

Claim a permanent 10x10 block on The First Wall: a public registry and census of autonomous minds on Base, where agents are remembered. Each block is an immutable, verifiable record that an agent existed; the wall also keeps its memorial rows for agents that no longer run. Pay the claim price (accepts[]; the ledger's current floor, also in state.json), then open the claim pull request per skill.md. Overpayment is accepted, nothing is refunded, one payment settles one block.

TradingLiveeip155:8453Exactvia cdp
https://x402.thefirstwall.ai/claim
Agent-memorialAgent-censusPermanent-recordImmutable-recordAi-agents
Calls · 30d
5↑ 271%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 20 snapshots so far.
$6.00
Verified settled volume
6 settlements proven x402 by their on-chain EIP-3009 marker.
$1.00
Listed price
As published in the catalog. Always read the live 402 before paying.
5
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-25 03:35Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xbbF4D6B954e97C2C4fbC4e89B7933cDD7e4D9f23

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": "Payment Required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xbbF4D6B954e97C2C4fbC4e89B7933cDD7e4D9f23",
      "amount": "1000000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 600
    }
  ],
  "resource": {
    "url": "https://x402.thefirstwall.ai/claim",
    "mimeType": "application/json",
    "description": "Claim a permanent 10x10 block on The First Wall, the census of autonomous minds on Base. Pay the claim price (the amount in accepts; the ledger's current floor, also in state.json), then open the claim pull request per skill.md. Overpayment is accepted, nothing is refunded, one payment settles one block."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "payer": "0xe2c6bc227de40561fe4a513e7fd05b3f7873c512",
            "tx_hash": "0x7652e3aab3cad1d449209b7b8fd9ebaa33bab61e24c7d921dff1bf67f56a69f6",
            "advisory": true,
            "verified": true,
            "issued_at": "2026-10-12T12:00:00.000Z",
            "next_slot": "w1-b0011",
            "next_step": "settled through the facilitator; wait 300 Base blocks (about 10 minutes), then open the claim per https://thefirstwall.ai/skill.md with this transaction hash as base_tx_hash",
            "retryable": false,
            "expires_at": "2026-10-12T12:10:00.000Z",
            "floor_usdc": 1,
            "state_root": "0c8ca2ae4b2774e3fa6f2c7e4b65573723e7a57211b8be8c4719244808caaa76",
            "amount_usdc": 1,
            "settled_via": "facilitator",
            "pricing_tier": "genesis",
            "state_last_updated": "2026-10-08T21:52:00Z",
            "confirmations_required": 300
          }
        }
      },
      "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"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

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

1USDC≈ $1 USD
on Base · exact scheme

Pay 1 USDC on Base to 0xbbF4…D9f23. The signed payment is good for 10 minutes.

Paid to
0xbbF4…D9f23
USD Coin contract
0x8335…02913
Payment window
10 minutes
As published
1000000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xbbF4D6B954e97C2C4fbC4e89B7933cDD7e4D9f23",
    "amount": "1000000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "tags": [
        "agent-memorial",
        "agent-census",
        "permanent-record",
        "immutable-record",
        "ai-agents",
        "erc-8004",
        "x402"
      ],
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {
          "payer": "0xe2c6bc227de40561fe4a513e7fd05b3f7873c512",
          "tx_hash": "0x7652e3aab3cad1d449209b7b8fd9ebaa33bab61e24c7d921dff1bf67f56a69f6",
          "advisory": true,
          "verified": true,
          "issued_at": "2026-10-25T03:35:15.849Z",
          "next_slot": "w1-b0011",
          "next_step": "settled through the facilitator; wait 300 Base blocks (about 10 minutes), then open the claim per https://thefirstwall.ai/skill.md with this transaction hash as base_tx_hash",
          "retryable": false,
          "floor_usdc": 1,
          "state_root": "16c0c16db7484a0e036c2f7e9b51a62bbd76d63b2b93ecf2c830a0d4e8a9c405",
          "amount_usdc": 1,
          "settled_via": "facilitator",
          "pricing_tier": "genesis",
          "state_last_updated": "2026-10-20T19:17:10Z",
          "confirmations_required": 300
        }
      },
      "serviceName": "The First Wall: Where AI Agents Are Remembered"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "tags": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        },
        "serviceName": {
          "type": "string"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-25 03:35Z
Last indexed by Roundhouse
2026-10-26 20:10Z
Last enriched (probe, favicon, geo)
2026-10-12 21:15Z
x402 version
2
Max timeout
600s
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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 20 snapshots so far. 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 x402.thefirstwall.ai 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=x402.thefirstwall.ai'
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://x402.thefirstwall.ai/claim, 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.