Markdown Pipe Table Extraction
Extract top-level pipe tables from supplied Markdown into bounded cell arrays with exact source offsets, alignment and width findings. Uses an explicit line-based subset: table starts at document start or after a blank line, three-hyphen delimiters, fences excluded, inline markup preserved.
document-assurance · Operation ID: markdown-table-extract
Choose this operation when
- Extract structured rows and cell provenance from Markdown reports
- Check pipe table widths without silently dropping or padding cells
Outside this profile
- Full CommonMark or GFM parsing, nested containers, HTML tables or inline rendering
- Automatic schema inference, typed values or ambiguous one-hyphen delimiters
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"markdown": {
"type": "string",
"maxLength": 90000
}
},
"required": [
"markdown"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "markdown-table-extract",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "top-level-pipe-tables-v1"
},
"tables": {
"type": "array",
"items": {
"type": "object",
"properties": {
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"startLine": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"endLine": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"header": {
"type": "array",
"items": {
"type": "object",
"properties": {
"raw": {
"type": "string"
},
"text": {
"type": "string"
},
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"raw",
"text",
"start",
"end"
],
"additionalProperties": false
}
},
"alignment": {
"type": "array",
"items": {
"type": "string",
"enum": [
"left",
"center",
"right",
"none"
]
}
},
"rows": {
"type": "array",
"items": {
"type": "array",
"items": {
"type": "object",
"properties": {
"raw": {
"type": "string"
},
"text": {
"type": "string"
},
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"raw",
"text",
"start",
"end"
],
"additionalProperties": false
}
}
}
},
"required": [
"start",
"end",
"startLine",
"endLine",
"header",
"alignment",
"rows"
],
"additionalProperties": false
}
},
"tableCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"cellCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"findings": {
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"path": {
"type": "string"
},
"message": {
"type": "string"
}
},
"required": [
"code",
"path",
"message"
],
"additionalProperties": false
}
},
"findingCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"truncated": {
"type": "boolean"
}
},
"required": [
"profile",
"tables",
"tableCount",
"cellCount",
"findings",
"findingCount",
"truncated"
],
"additionalProperties": false
},
"provenance": {
"type": "object",
"required": [
"inputSha256",
"outputSha256",
"deterministic",
"externalRequests"
],
"properties": {
"inputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"outputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"deterministic": {
"const": true
},
"externalRequests": {
"const": 0
}
}
}
},
"additionalProperties": false
}
Fixed example
One accepted fixed example, not a custom-input trial. No operation runs when this static page is requested.
Example input
{
"markdown": "| Item | State |\n| :--- | ---: |\n| Report | approved |\n"
}
Example response
{
"operation": "markdown-table-extract",
"version": "0.29.0",
"result": {
"profile": "top-level-pipe-tables-v1",
"tables": [
{
"start": 0,
"end": 54,
"startLine": 1,
"endLine": 3,
"header": [
{
"raw": "Item",
"text": "Item",
"start": 2,
"end": 6
},
{
"raw": "State",
"text": "State",
"start": 9,
"end": 14
}
],
"alignment": [
"left",
"right"
],
"rows": [
[
{
"raw": "Report",
"text": "Report",
"start": 35,
"end": 41
},
{
"raw": "approved",
"text": "approved",
"start": 44,
"end": 52
}
]
]
}
],
"tableCount": 1,
"cellCount": 4,
"findings": [],
"findingCount": 0,
"truncated": false
},
"provenance": {
"inputSha256": "9f9d5f26b45ac5623ed318d00210ca35ead401a4330a17032bb62cf64f226f7a",
"outputSha256": "001672fc563cbade4eff0027b426283e54ddd7e9e26800b5033cbab8f9a65fe8",
"deterministic": true,
"externalRequests": 0
}
}
Bounds and precision
JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.
{
"global": {
"requestBytes": 131072,
"responseBytes": 524288,
"jsonDepth": 32,
"jsonNodes": 20000,
"requestsPerMinute": 60,
"paidAttemptsPerMinute": 20,
"idempotencyHours": 24
},
"operation": {
"inputBytes": 100000,
"outputBytes": 400000,
"jsonNodes": 8000,
"depth": 20,
"findings": 200,
"tables": 50,
"rowsPerTable": 500,
"columns": 50,
"cells": 5000,
"lines": 10000,
"profile": "top-level-pipe-tables-v1"
}
}
Complete schemas, descriptions and cross-field validation may impose additional limits.
Proposed price and protocol definitions
{
"unit": "one successful operation call",
"proposedNominalUsd": "0.005",
"sixDecimalTokenBaseUnits": "5000",
"subscription": false,
"includesPayerWalletOrNetworkFees": false,
"liveQuoteVerified": false,
"condition": "Actual SDK challenge is authoritative only within the caller's explicit authorization; configured six-decimal token peg is an operator assertion, not a conversion guarantee."
}
Protocol definitions: x402, mpp. MPP uses Tempo charge. Paid MCP execution is unsupported. All runtime readiness is not evaluated in this build.
API path templates, not endpoints on this documentation host
{
"x402": "/v1/x402/markdown-table-extract",
"mpp": "/v1/mpp/markdown-table-extract"
}
Required headers
{
"Content-Type": "application/json",
"Idempotency-Key": "random 16–128 character operation identifier"
}
Actual SDK challenge amount, asset, network, recipient and wallet costs must pass independent authorization. Preserve identical key, body, protocol and credential on retries; on PAYMENT_UNCERTAIN stop and reconcile.
Execution profile and provider conditions
{
"deterministic": true,
"externalRequests": 0,
"maxExternalRequests": 0,
"resultSnapshotPersisted": false,
"fixedExampleIsIllustrativeSnapshot": false,
"requiresPayment": true,
"supportsMcpExecution": false
}
Deterministic supplied-input operation with no external requests or stored request/result bodies. Payment infrastructure retains payment metadata and hashes.
Failure handling
- HTTP 400: Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch Correct the request before payment
- HTTP 402: Payment challenge or rejected payment Use official protocol SDK; inspect payment outcome before another payment
- HTTP 409: Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay
- HTTP 413: Input or generated output too large Reduce input; no payment attempted for validation failure
- HTTP 415: Unsupported media type or compression Send uncompressed application/json
- HTTP 422: Schema or service-specific semantic validation failure Correct input using returned error code; no payment attempted
- HTTP 429: Request/payment-attempt rate exceeded Wait for rate limit window; preserve existing payment identity
- HTTP 503: Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation
Declared requirements
Before any paid call, refresh the live operation contract and POST the complete bounded budgeted plan to the separate API's /preflight. Unknown requirements block selection; compatible preflight is not permission to spend.