Bilig WorkPaper MCP formula engine for n8n agents

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        "content": "## Bilig WorkPaper MCP\n\nCalls the public Bilig WorkPaper MCP endpoint, writes a formula into a demo workbook, and verifies calculated readback + restore proof.\n\nNo Excel, browser automation, credentials, or local files required.\n\nRepo: https://github.com/proompteng/bilig"
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        "jsonBody": "{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"tools/call\",\"params\":{\"name\":\"set_cell_contents\",\"arguments\":{\"sheetName\":\"Inputs\",\"address\":\"C2\",\"value\":\"=B2*B3\"}}}",
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      "name": "Extract formula proof",
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        "jsCode": "const response = $input.first().json;\nconst text = response?.result?.content?.[0]?.text;\nif (!text) {\n  throw new Error('Bilig MCP did not return MCP text content.');\n}\nconst proof = JSON.parse(text);\nconst displayValue = proof?.after?.displayValue;\nconst formula = proof?.after?.formula;\nconst restoredMatchesAfter = proof?.checks?.restoredMatchesAfter === true;\nif (formula !== '=B2*B3') {\n  throw new Error('Unexpected formula readback: ' + String(formula));\n}\nif (displayValue !== '5') {\n  throw new Error('Unexpected calculated value: ' + String(displayValue));\n}\nif (!restoredMatchesAfter) {\n  throw new Error('Bilig MCP did not prove restored readback.');\n}\nreturn [{\n  json: {\n    summary: 'Bilig WorkPaper calculated =B2*B3 as 5 and proved restored readback.',\n    editedCell: proof.editedCell,\n    formula,\n    displayValue,\n    restoredMatchesAfter,\n    github: 'https://github.com/proompteng/bilig',\n    docs: 'https://proompteng.github.io/bilig/mcp-workpaper-tool-server.html',\n    mcpRegistry: 'https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.proompteng%2Fbilig-workpaper',\n    proof\n  }\n}];"
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