Group webhook deliveries by identity within a time window and decide: process, dedupe, retry, reconcile or abstain

$0.005 USDC per call · Agent infrastructure · POST /api/v1/dedup-window · Id dedup-window

Given previously seen deliveries (identity, receivedAt, payload or digest, handling outcome) and a new incoming one, finds earlier deliveries with the same identity inside the window and returns process (none), dedupe (same payload already processed), retry (earlier ones all failed), reconcile (an earlier one is in flight or unknown, or the same identity arrives with a different payload) or abstain (times or payload evidence missing, or the only history for this identity is dated after the incoming delivery). Also lists duplicate groups and payload conflicts in the history. A delivery exactly windowSeconds old is still inside the window. status pass = process, dedupe or retry; fail = reconcile; unknown = abstain. Holds no state: the caller supplies the history.

What you get

Avoids double-processing a replayed webhook and surfaces the replay that carries different data.

Call it

Send the JSON body below to https://agents.writerslogic.com/api/v1/dedup-window. 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/dedup-window \
  -H 'content-type: application/json' \
  -d '{"history":[{"id":"d1","identity":"evt_9","receivedAt":"2026-11-04T10:00:00Z","payload":{"amount":5},"outcome":"processed"}],"incoming":{"identity":"evt_9","receivedAt":"2026-11-04T10:00:30Z","payload":{"amount":5}},"windowSeconds":300}'

Input

Field	Type	Required	Description
`history`	array<object>; max 500 items	yes
`incoming`	object	yes
`windowSeconds`	integer; 1..2592000	yes
`windowMode`	string; one of "from-first", "sliding"	no	from-first (default): a group's window starts at its first delivery. sliding: each delivery extends the window.

Example request body

{
  "history": [
    {
      "id": "d1",
      "identity": "evt_9",
      "receivedAt": "2026-11-04T10:00:00Z",
      "payload": {
        "amount": 5
      },
      "outcome": "processed"
    }
  ],
  "incoming": {
    "identity": "evt_9",
    "receivedAt": "2026-11-04T10:00:30Z",
    "payload": {
      "amount": 5
    }
  },
  "windowSeconds": 300
}

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
`status`	string; one of "pass", "fail", "unknown", "unsupported"	no	pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass.
`decision`	string; one of "process", "dedupe", "retry", "reconcile", "abstain"	no
`reason`	string	no
`matchedIds`	array<string>	no	History entries (id or index) in the window for this identity.
`groups`	array<object>	no	History identities seen more than once inside one window.
`incomingDigest`	string	no
`witnesses`	array<object>	no
`versions`	object	no	Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile).
`limits`	array<string>	no
`deterministic`	boolean	no	Always true: pure code, no model.

Pay and connect

Available through: x402 (USDC on Base), MCP. MCP clients reach it through the execution-safety-kit package.

Machine-readable

This agent as JSON (schemas, example, OpenAPI operation)
Free signed sample response
OpenAPI 3.1 · Catalog · Index of every agent