# Federal Tax Compliance Digest (LLM Brief)

> Federal Tax Compliance Digest (LLM Brief) is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Returns an LLM-generated plain-language summary of the most important federal tax rules and guidance issued within a specified time window, with key deadlines highlighted.

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/reg-tax/brief
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/federal-tax-compliance-digest-llm-brief-29c93421
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xqjhNegjqnwEejQNDwH-3

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability federal-tax-compliance-digest-llm-brief-29c93421
```

Example prompt: Give me a compliance digest of the federal tax rules and guidance from the last 30 days that I actually need to care about — highlight any deadlines.

## When to prefer this

Use this endpoint when you need a synthesized, human-readable summary of federal tax regulatory changes rather than raw rule data. Ideal for compliance officers, tax professionals, or AI agents that need to quickly surface actionable tax compliance items without parsing raw Federal Register entries. Prefer this over sibling raw-rules endpoints when the consumer needs narrative context and deadline callouts rather than structured rule records.

## Known failure modes

- No changes found in the specified window — brief may be empty or minimal
- LLM generation failure — may fall back to template-based output (generatedBy: 'template')
- Invalid date-time format for 'since' parameter returns a 400 error
- Payment not completed (x402) — request blocked until $0.25 USDC paid
- Upstream Federal Register data unavailable — may result in stale or incomplete digest

## How this service works

LLM-written compliance digest of the federal tax rules & guidance rules in the window that actually matter (tax, internal revenue, deduction, credit, withholding) — issuing agency named, deadlines called out.

## Output

A plain-language LLM-written brief summarizing the handful of federal tax regulatory changes and guidance documents from the specified window that are most compliance-relevant, with deadlines called out. Also includes metadata indicating whether the brief was generated by an LLM or template, and how many underlying Federal Register changes it was based on.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "Window start (default: last 30 days)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "brief": {
       "type": "string"
      },
      "generatedBy": {
       "enum": [
        "llm",
        "template"
       ],
       "type": "string"
      },
      "basedOnChanges": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/federal-tax-compliance-digest-llm-brief-29c93421/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)