---
title: "226J Response Evidence Pack Builder"
method: POST
path: "/v1/tools/build_226j_response_evidence_pack"
tags: ["TODO_TAGS_REVIEW"]
---

# 226J Response Evidence Pack Builder

`POST /v1/tools/build_226j_response_evidence_pack`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/build_226j_response_evidence_pack`
- Auth: none declared

Terminal node of the aca-226j-response-composer chain: assembles a replayable evidence pack responding to an IRS Letter 226J proposed Employer Shared Responsibility Payment assessment. Recomputes the affordability and exposure position against the IRS-asserted figure, computes the response-window deadline from the supplied letter date, and records a named-HR/benefits-officer attestation closure (mirrors the shipped ML-2 escalation-closure pattern). Not a guarantee of abatement -- this is the employer's replayable dispute evidence, never a determination of liability. Zero network, zero PII.

**Tool URL:** https://ainumbers.co/chaingraph/art-300-aca-226j-response-evidence-pack.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `affordability_result` unknown, required
  - `attestation` unknown, required
  - `disputed_employee_ids` unknown[], required
    - unknown
  - `esrp_result` unknown, required
  - `irs_asserted_esrp_annual` unknown, required
  - `letter_date` unknown, required

## Response `200`

Successful tool execution result

- object
  - `attestation` object
    - `signed_at` string
    - `signer_name` string
    - `signer_title` string
    - `status` string
  - `disputed_employee_count` integer
  - `error` string
  - `exposure_delta` integer
  - `irs_asserted_esrp_annual` integer
  - `letter_date` string
  - `recomputed_exposure_annual` integer
  - `response_deadline` string
  - `response_window_days` integer
  - `response_window_source` string

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)