---
title: "Texas TDU Lookup by ZIP"
method: POST
path: "/api/v1/get-utility-for-zip"
tags: ["data-feed"]
---

# Texas TDU Lookup by ZIP

`POST /api/v1/get-utility-for-zip`

Resolve any Texas residential ZIP code to its Transmission and Distribution Utility (TDU): Oncor, CenterPoint, AEP Texas Central, AEP Texas North, TNMP, or Lubbock Power & Light. Returns the canonical utility code, full display name, short name, and whether the ZIP is in a deregulated retail electric market. Backed by Light API's eligibility check (private API made public via this tool).

A primitive utility-lookup tool. Useful as a building block for any agent
or app that needs to know which TDU serves a Texas ZIP — TDU determines
which retail electric providers are available, what delivery rates apply,
and whether the customer can switch providers.

Texas has 6 TDUs serving the deregulated retail market:
- Oncor Electric Delivery (DFW + much of north/central Texas)
- CenterPoint Energy (Houston + southeast Texas)
- AEP Texas Central (south Texas, including Corpus Christi)
- AEP Texas North (Abilene + west-central Texas)
- Texas-New Mexico Power Company / TNMP (scattered pockets)
- Lubbock Power & Light (Lubbock — recently joined deregulated market)

Returns null for ZIPs that aren't in the deregulated market (e.g., Austin
Energy / CPS / municipal utilities — these markets don't offer retail
provider choice).

**Why this tool exists**: Light API's eligibility endpoint isn't publicly
accessible. This tool wraps it as a stable, public primitive so any agent
can resolve TDU without needing Light credentials.

## Request body

- object
  - `zipCode` string, required — 5-digit Texas ZIP code. Examples: '75201' (Dallas), '77002' (Houston), '78401' (Corpus Christi), '76901' (Abilene), '79401' (Lubbock).

## Response `200`

Tool ran successfully.

- object
  - `zipCode` string, required — The ZIP code that was looked up.
  - `utilityCode` string, required — Canonical TDU code. One of: 'ONCOR', 'CNP' (CenterPoint), 'AEP_CENTRAL', 'AEP_NORTH', 'TNMP', 'LPPL' (Lubbock Power & Light).
  - `utilityDisplayName` string, required — Full TDU name as the utility presents it. Examples: 'Oncor Electric Delivery', 'CenterPoint Energy', 'Texas-New Mexico Power Company'.
  - `utilityShortName` string, required — Common short name. Examples: 'Oncor', 'CenterPoint', 'AEP Central'.
  - `isDeregulated` boolean, required — True if the ZIP is in the Texas deregulated retail electric market (where customers can choose a retail provider). False for municipal utility territories (Austin Energy, CPS, etc.).
  - `eligibilityLikelihood` number, required — Light API's confidence (0-1) that this ZIP can be served by a retail provider. Useful for spotting edge cases like new construction or address ambiguity.
  - `resolved` boolean, required — True if Light API returned a confident answer. False if we fell back to the default (ONCOR) due to API unavailability or unknown ZIP.

## Other responses

- `400` — Request body was missing, malformed JSON, or failed input schema validation.
- `500` — Tool execution failed or produced an output that violated the schema.

---

[API](https://skmtc.dev/meterplan/apis/meter-energy-public-api.md) · [All operations](https://skmtc.dev/meterplan/apis/meter-energy-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/meterplan/meter-energy-public-api/revisions/ebf1846a188d/schema)