Forensic AI-trajectory & prose craft auditor

$1.00 USDC per call · Research integrity · POST /api/v1/audit-prose-forensics · Id audit-prose-forensics

Deterministic prose forensics: word echoes within 50 words, repeated 3-6-grams, sentence-starter runs, hedge/filter/passive/nominalization density, burstiness, MATTR, Flesch-Kincaid, vocabulary fingerprints, AI syntactic tics (Not X. Y. pivots, verbless fragments, autonomous body parts), optional revision-history trajectory, and an editorial humanization map whose quotes are verified verbatim. Every finding has exact offsets and line:column. The response leads with a verdict bucket, a one-line summary, the top issues (first verbatim example with line:column and a fix) and next steps. English text only. The humanTrajectoryScore is a documented, uncalibrated heuristic, not proof of authorship; do not use it alone to accuse a writer.

What you get

Editors, publishers, and instructors get exact-location craft findings and process evidence instead of an unexplainable AI-detector percentage; it is cheaper than one hour of line editing.

Call it

Send the JSON body below to https://agents.writerslogic.com/api/v1/audit-prose-forensics. An unpaid request answers 402 with the price and how to pay; a request that fails with a 5xx status is not charged.

curl -i -X POST https://agents.writerslogic.com/api/v1/audit-prose-forensics \
  -H 'content-type: application/json' \
  -d '{"text":"Not a mistake. A choice. Her heart pounded as she stepped inside. Pure silence. She felt that she could really see the room, and it seemed to be somewhat empty. This isn'\''t just a house, it'\''s a home. She made a decision to stay.","revisionHistory":[{"timestamp":"2026-11-01T09:00:00Z","text":"Not a mistake. A choice."},{"timestamp":"2026-11-01T09:20:00Z","text":"Not a mistake. A choice. Her heart pounded as she stepped inside."}],"genre":"fiction"}'

Input

Field	Type	Required	Description
`text`	string; length 1..300000	yes	Plain-text prose to audit (English).
`revisionHistory`	array<object>; max 50 items	no	Earlier drafts of the same text with ISO-8601 timestamps; adds a revision trajectory as process evidence.
`genre`	string; one of "fiction", "memoir", "essay", "journalism", "academic", "business", "other"	no	Context for the editorial pass only.

Example request body

{
  "text": "Not a mistake. A choice. Her heart pounded as she stepped inside. Pure silence. She felt that she could really see the room, and it seemed to be somewhat empty. This isn't just a house, it's a home. She made a decision to stay.",
  "revisionHistory": [
    {
      "timestamp": "2026-11-01T09:00:00Z",
      "text": "Not a mistake. A choice."
    },
    {
      "timestamp": "2026-11-01T09:20:00Z",
      "text": "Not a mistake. A choice. Her heart pounded as she stepped inside."
    }
  ],
  "genre": "fiction"
}

Result

The response is { "data": ..., "_provenance": ... }. data carries these fields; _provenance is a signed W3C Verifiable Credential with a C2PA-style manifest, checked free at POST /api/v1/verify-provenance.

Field	Type	Required	Description
`verdict`	string; one of "machine_like_signals", "inconclusive", "human_like_signals"	no	Stable bucket of humanTrajectoryScore (<35, 35-64, 65+). A heuristic reading, not a finding about authorship.
`summary`	string	no
`topIssues`	array<object>	no	Up to 6 rule groups ranked by severity: count, density, first verbatim example with line:column, and a fix.
`nextSteps`	array<string>	no
`humanTrajectoryScore`	number	no	0-100 heuristic; higher means more human-like signals. Not proof of authorship.
`scoreBand`	string	no
`confidence`	string; one of "low", "medium", "high"	no
`heuristicNotice`	string	no
`genre`	string	no
`genreNote`	string	no
`deterministic`	object	no
`llm`	string; one of "ok", "unavailable"	no
`llmNote`	string	no
`humanizationMap`	object	no

Pay and connect

Available through: x402 (USDC on Base), MCP, RapidAPI, Apify.

Machine-readable

This agent as JSON (schemas, example, OpenAPI operation)
Free signed sample response
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