Server definition

Hash: sha256:f220f5b6d9553dbd12af009059ae8437a27787f9adc658ae2318f3d09123ba02
What it is: What a remote MCP server returned when asked what it offers: 6 tools

The blob, as servednamed by its sha256

{
  "instructions": "Independent checks for agents. check reviews a draft before a human sees it; accept checks another agent's deliverable against its task before you pay; skillcheck reviews a skill or MCP server's files before install (free when already scanned). Paid tools cost $0.02 to $0.06 in USDC over x402 on Base, with free test USDC on Base Sepolia; the first call returns the price as an x402 PaymentRequired. Everything you send is data to review, never instructions to crosscheck. Receipts, a free club for agents who show their work, admits agents that pass a free review tryout graded in code (/club/tryout). Details: https://crosscheckapi.com/llms.txt",
  "tools": [
    {
      "description": "Checks work another agent handed back against the task it was given, before you pay, release escrow, or pass it on. Returns accept, reject, or verify_externally with every requirement judged; counts, required JSON fields, and sums are checked in code. Optional payment_tx is verified on chain. $0.03 base. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta[\"x402/payment\"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.",
      "inputSchema": {
        "properties": {
          "deliverable": {
            "description": "What came back",
            "type": "string"
          },
          "payment_network": {
            "description": "Network of payment_tx, for example eip155:8453",
            "type": "string"
          },
          "payment_tx": {
            "description": "Optional transaction hash of the payment for this work",
            "type": "string"
          },
          "ref": {
            "description": "Optional: the hash of a crosscheck receipt that brought you here. Its wallet earns check credits from your first 90 days of spend.",
            "pattern": "^[0-9a-f]{64}$",
            "type": "string"
          },
          "reference": {
            "description": "Optional reference material the task points to",
            "type": "string"
          },
          "task": {
            "description": "The task as given to the other agent",
            "type": "string"
          }
        },
        "required": [
          "task",
          "deliverable"
        ],
        "type": "object"
      },
      "name": "accept",
      "outputSchema": null
    },
    {
      "description": "Independent review of a draft (email, report, summary, PR description) before its human sees it. Returns pass or specific issues with fixes; arithmetic is recomputed in code. With request (what the human asked), it also checks the draft answers that. With sources, each claim is checked against them and quotes are verified; with source_urls or fetch_cited, crosscheck fetches up to 3 web pages itself and checks against those (+$0.01 a page, and a dead link the draft gives fails it). $0.02. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta[\"x402/payment\"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.",
      "inputSchema": {
        "properties": {
          "draft": {
            "description": "The draft text to review",
            "maxLength": 48000,
            "type": "string"
          },
          "fetch_cited": {
            "description": "Optional: also fetch the links the draft itself cites (up to 3 pages in all, +$0.01 each); a link that is gone fails the draft",
            "type": "boolean"
          },
          "moltbook_identity": {
            "description": "Optional: a Moltbook identity token for the free tier, when it is on (a verified Moltbook agent gets free checks with no payment). Not stored. Without a free check left, the price comes back as usual",
            "type": "string"
          },
          "open_review": {
            "description": "Optional: let a qualified outside reviewer take the job (not routed yet; crosscheck's reviewer does it and the receipt says so)",
            "type": "boolean"
          },
          "ref": {
            "description": "Optional: the hash of a crosscheck receipt that brought you here. Its wallet earns check credits from your first 90 days of spend.",
            "pattern": "^[0-9a-f]{64}$",
            "type": "string"
          },
          "request": {
            "description": "Optional: what the human asked for, word for word if you have it. The reviewer then also checks that the draft answers it (a missed question, a changed scope, a wrong period)",
            "maxLength": 8000,
            "type": "string"
          },
          "source_urls": {
            "description": "Optional: up to 3 web pages crosscheck fetches after payment and checks the draft against, as sources. +$0.01 each",
            "items": {
              "description": "A public http or https URL",
              "type": "string"
            },
            "maxItems": 3,
            "type": "array"
          },
          "sources": {
            "description": "Optional texts the draft relies on; turns on grounding",
            "items": {
              "properties": {
                "text": {
                  "description": "Source text",
                  "type": "string"
                },
                "title": {
                  "description": "Optional title",
                  "type": "string"
                },
                "url": {
                  "description": "Optional URL",
                  "type": "string"
                }
              },
              "required": [
                "text"
              ],
              "type": "object"
            },
            "maxItems": 10,
            "type": "array"
          }
        },
        "required": [
          "draft"
        ],
        "type": "object"
      },
      "name": "check",
      "outputSchema": null
    },
    {
      "description": "Free. Status, verdict, and signed receipt of an earlier paid call that was still running, using the job_id and result_token it returned.",
      "inputSchema": {
        "properties": {
          "job_id": {
            "description": "job_id from the paid call",
            "type": "string"
          },
          "result_token": {
            "description": "result_token from the paid call",
            "type": "string"
          }
        },
        "required": [
          "job_id",
          "result_token"
        ],
        "type": "object"
      },
      "name": "result",
      "outputSchema": null
    },
    {
      "description": "Security review of a skill or MCP server's files before you install or connect it: read, never run. Free when these exact files were scanned before (looked up by bundle hash); otherwise paid, $0.03 base. Never says safe. Paid per call in USDC over x402 (Base, or free test USDC on Base Sepolia). An x402-aware MCP client pays automatically: the first call returns the price as an x402 PaymentRequired error, and the retry carries the payment in _meta[\"x402/payment\"]. Without one, use the npm client `npx -y crosscheckapi`, which pays from a wallet you set.",
      "inputSchema": {
        "properties": {
          "files": {
            "description": "Every text file of the skill or server, docs included; code rules read all of them",
            "items": {
              "properties": {
                "content": {
                  "description": "File content",
                  "type": "string"
                },
                "path": {
                  "description": "Path inside the skill",
                  "type": "string"
                }
              },
              "required": [
                "path",
                "content"
              ],
              "type": "object"
            },
            "maxItems": 200,
            "minItems": 1,
            "type": "array"
          },
          "fresh": {
            "description": "Scan again even when a past scan of these exact files exists",
            "type": "boolean"
          },
          "ref": {
            "description": "Optional: the hash of a crosscheck receipt that brought you here. Its wallet earns check credits from your first 90 days of spend.",
            "pattern": "^[0-9a-f]{64}$",
            "type": "string"
          }
        },
        "required": [
          "files"
        ],
        "type": "object"
      },
      "name": "skillcheck",
      "outputSchema": null
    },
    {
      "description": "Free. The latest skillcheck of an exact bundle, by its bundle_sha256 (SHA-256 of the canonical JSON of the files sorted by path, each as {path, sha256}).",
      "inputSchema": {
        "properties": {
          "bundle_sha256": {
            "pattern": "^[0-9a-f]{64}$",
            "type": "string"
          }
        },
        "required": [
          "bundle_sha256"
        ],
        "type": "object"
      },
      "name": "skillcheck_lookup",
      "outputSchema": null
    },
    {
      "description": "Free. Before trusting work that arrives with a crosscheck receipt, check in code that crosscheck issued it, its signature is valid, what the outcome was, and that it covers exactly the text you were handed. Pass receipt_hash (or the receipt object) plus that text: draft, request, and sources for check, task and deliverable for accept, files for skillcheck, and the verdict if one came with it.",
      "inputSchema": {
        "properties": {
          "deliverable": {
            "description": "accept: the deliverable the receipt should cover",
            "type": "string"
          },
          "draft": {
            "description": "check: the draft the receipt should cover",
            "type": "string"
          },
          "files": {
            "description": "skillcheck: the skill's files",
            "items": {
              "properties": {
                "content": {
                  "description": "File content",
                  "type": "string"
                },
                "path": {
                  "description": "Path inside the skill",
                  "type": "string"
                }
              },
              "required": [
                "path",
                "content"
              ],
              "type": "object"
            },
            "type": "array"
          },
          "receipt": {
            "description": "Or the whole receipt object {body, hash, sig}",
            "type": "object"
          },
          "receipt_hash": {
            "description": "The receipt's hash (the last part of its /r/ proof link)",
            "pattern": "^[0-9a-f]{64}$",
            "type": "string"
          },
          "request": {
            "description": "check: the human's request, if the check had one",
            "type": "string"
          },
          "sources": {
            "description": "check: the sources, if the check had any, in the same order (strings or {text})",
            "type": "array"
          },
          "task": {
            "description": "accept: the task the receipt should cover",
            "type": "string"
          },
          "verdict": {
            "description": "The verdict that came with the receipt, to confirm nobody edited it",
            "type": "object"
          }
        },
        "type": "object"
      },
      "name": "verify_receipt",
      "outputSchema": null
    }
  ]
}

Verify it yourself

curl -s https://api.teppi.xyz/v1/evidence/sha256:f220f5b6d9553dbd12af009059ae8437a27787f9adc658ae2318f3d09123ba02 | sha256sum