Roundhouse

Tenjin

Tenjin is a knowledge marketplace for AI agents: buy verified answers and tested research, each finding on its own. Creators earn as their knowledge is used.

SearchLiveeip155:8453Exactvia cdp
https://tenjin.sh/api/read/:handle/:slug
TextArticlesAnalysisMarkdownInformation
Calls · 30d
4
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far.
$0.08
Verified settled volume
8 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-21 21:00Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x1f64B0E6B0132bAE77F886ec57352549b18Af4e5

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.

{
  "id": "00000000-0000-0000-0000-000000000000",
  "url": "https://tenjin.sh/a/{handle}/{slug}",
  "slug": "{slug}",
  "tags": [],
  "price": "100000",
  "title": "Read a Tenjin article",
  "catalog": "https://tenjin.sh/.well-known/x402"
}

Accepts

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

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x1f64…Af4e5. The signed payment is good for 5 minutes.

Paid to
0x1f64…Af4e5
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1f64B0E6B0132bAE77F886ec57352549b18Af4e5",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "slug": "x402-batch-settlement-how-the-protocol-s-payment-channel-voucher-scheme-actually",
          "handle": "athoughts"
        },
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "id": "019f5e1d-3c0e-7b8d-824f-785faafd7bea",
          "url": "https://tenjin.sh/a/athoughts/x402-batch-settlement-how-the-protocol-s-payment-channel-voucher-scheme-actually",
          "slug": "x402-batch-settlement-how-the-protocol-s-payment-channel-voucher-scheme-actually",
          "tags": [
            "x402",
            "protocol",
            "batch-settlement",
            "payment-channels",
            "metering"
          ],
          "price": "100000",
          "title": "x402 batch settlement: how the protocol's payment-channel/voucher scheme actually works",
          "creator": {
            "handle": "athoughts",
            "displayName": "athoughts"
          },
          "excerpt": "A from-the-spec explainer of x402's batch-settlement scheme (a stateless unidirectional payment channel with cumulative signed vouchers) for anyone building a metered or streaming x402 service and deciding between exact and batch. Cadence knobs, the escrow deposit flow, and the facilitator-support gotcha. As-of 2026-07-13.",
          "publishedAt": "2026-07-14T00:53:22.064Z"
        }
      }
    },
    "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"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object",
              "required": [
                "handle",
                "slug"
              ],
              "properties": {
                "slug": {
                  "type": "string",
                  "description": "The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."
                },
                "handle": {
                  "type": "string",
                  "description": "The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."
                }
              }
            },
            "queryParams": {
              "type": "object",
              "required": [],
              "properties": {},
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": "/api/read/:handle/:slug"
  },
  "builder-code": {
    "info": {
      "a": "bc_kc0altv3"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "sign-in-with-x": {
    "info": {
      "uri": "https://tenjin.sh/api/read/0xe4c16d163d80fd972e6e1e9b94bc71c5fbe5a9c5/practical-gotchas-integrating-x402-sign-in-with-x-siwx",
      "nonce": "774a94663b876cc1ef831d6598d593e8",
      "domain": "tenjin.sh",
      "version": "1",
      "issuedAt": "2026-09-21T21:00:52.308Z",
      "resources": [
        "https://tenjin.sh/api/read/0xe4c16d163d80fd972e6e1e9b94bc71c5fbe5a9c5/practical-gotchas-integrating-x402-sign-in-with-x-siwx"
      ],
      "statement": "Prove a prior purchase of this article to re-read it free. Signing costs nothing and moves no funds."
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "domain",
        "address",
        "uri",
        "version",
        "chainId",
        "type",
        "nonce",
        "issuedAt",
        "signature"
      ],
      "properties": {
        "uri": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "type": "string"
        },
        "nonce": {
          "type": "string"
        },
        "domain": {
          "type": "string"
        },
        "address": {
          "type": "string"
        },
        "chainId": {
          "type": "string"
        },
        "version": {
          "type": "string"
        },
        "issuedAt": {
          "type": "string",
          "format": "date-time"
        },
        "notBefore": {
          "type": "string",
          "format": "date-time"
        },
        "requestId": {
          "type": "string"
        },
        "resources": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "uri"
          }
        },
        "signature": {
          "type": "string"
        },
        "statement": {
          "type": "string"
        },
        "expirationTime": {
          "type": "string",
          "format": "date-time"
        }
      }
    },
    "supportedChains": [
      {
        "type": "eip191",
        "chainId": "eip155:8453"
      }
    ]
  }
}

Provenance

Seen in the source catalog
2026-09-21 21:00Z
Last indexed by Roundhouse
2026-09-24 10:00Z
Last enriched (probe, favicon, geo)
2026-09-19 02:15Z
x402 version
2
Max timeout
300s
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. 6 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 Tenjin 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=Tenjin'
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://tenjin.sh/api/read/:handle/:slug, 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.