---
title: "3-way match"
method: POST
path: "/v1/po-match"
tags: ["3-way match"]
---

# 3-way match

`POST /v1/po-match`

## Request

- Base URL: `https://api.thecompound.tech`
- URL: `https://api.thecompound.tech/v1/po-match`
- Auth: HTTP bearer

ParseRail compares an invoice, purchase order, and receipt. It marks the documents as matched, partial, or mismatched, and flags and sizes every discrepancy.

Cost: 10 credits ($0.10) — charged only on success.

## Headers

- `ParseRail-Dry-Run` '1' | 'true'
- `Idempotency-Key` string

## Request body

- object
  - `invoice` string, required: The invoice — structured JSON (e.g. /v1/invoice output) or raw text.
  - `purchaseOrder` string, required: Provide the PO as structured JSON or raw text.
  - `receipt` string: Provide an optional goods receipt or delivery note for a 3-way match.
  - `tolerancePct` number: Set the price variance tolerance in percent. The default is 2.

## Response `200`

The call succeeded. The response contains result fields and a usage envelope. With `ParseRail-Dry-Run: 1` the body is a DryRun object instead.

- union
  - object
    - `status` 'matched' | 'partial' | 'mismatched', required
    - `discrepancies` object[], required
      - `field` string, required
      - `invoice` string, nullable
      - `purchaseOrder` string, nullable
      - `receipt` string, nullable
      - `severity` 'low' | 'medium' | 'high', required
      - `note` string, required
    - `recommendation` string, required: Return approve | hold | reject with the reason.
    - `usage` Usage, required
      - `credits` integer, required: Credits burned by this call.
      - `balanceRemaining` integer, required: Wallet balance after the charge.
  - DryRun: A dry run: auth, the per-key throttle, body validation and the balance precheck ran. No model ran and nothing was charged.
    - `dryRun` true, required
    - `valid` true, required: The body passed validation. An invalid body returns 400 instead.
    - `endpoint` string, required
    - `wouldCharge` integer, required: Credits a successful live call would charge.
    - `balance` integer, required: Your wallet balance now.
    - `liveStatus` 200 | 202 | 402, required: The status a live call with this body would get: 402 when the balance or the key's monthly cap cannot cover it, 202 for `async: true`, else 200.
    - `keyCapRemaining` integer: Present when the key carries a monthly cap: credits left under it this month.
    - `usage` Usage, required
      - `credits` integer, required: Credits burned by this call.
      - `balanceRemaining` integer, required: Wallet balance after the charge.
    - `requestId` string, required

## Other responses

- `400`: Invalid request body.
- `401`: Missing or invalid API key.
- `402`: `insufficient_credits`: the balance cannot cover the call. `spend_cap_reached`: the key has reached its monthly cap. Nothing is charged.
- `429`: Rate limit exceeded.

---

[API](https://skmtc.dev/thecompound/apis/parserail.md) · [All operations](https://skmtc.dev/thecompound/apis/parserail/llms.txt) · [OpenAPI document](https://skmtc.dev/thecompound/apis/parserail/revisions/7895a3b7812b?raw)