# GB Capacity Market Register Scraper – NESO CMUs & Agreements (`ukopendatatools/gb-capacity-market-register`) Actor

Every GB Capacity Market Unit from NESO's official register: T-4/T-1 auctions, delivery year, applicant and parent company, technology (BESS, CCGT, DSR…), de-rated MW, agreements and component sites. Open data.

- **URL**: https://apify.com/ukopendatatools/gb-capacity-market-register.md
- **Developed by:** [UK Open Data Tools](https://apify.com/ukopendatatools) (community)
- **Categories:** Business, Lead generation, Developer tools
- **Security:** Limited permissions
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $5.00 / 1,000 results

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.

Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For examples already wired to this Actor's own input schema, see the [API](#api) section below.

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).

# README

## GB Capacity Market Register Scraper – NESO CMU, Agreements & Components

**Get every Capacity Market Unit (CMU) in Great Britain's official Capacity Market Register as clean JSON, CSV or Excel**, straight from NESO's (National Energy System Operator, formerly National Grid ESO) open-data API. That covers T-4, T-3, T-1 and transitional auctions, delivery years, applicant and parent company, technology (batteries/BESS, CCGT, DSR, interconnectors, solar, wind…), connection and de-rated capacity, capacity agreements and obligations, plus each CMU's **component sites** (location, postcode district, OS grid reference). There's one record per CMU, so you no longer have to download and join two 30,000-row CSVs.

### What data does it return?

- **Auction:** delivery year, auction type and name, application ID, prequalification decision, opt-in/out status
- **Who:** CMU ID and name, applicant, parent company, registered holder, agent
- **What:** CMU type and category (new build, refurbishing, existing, DSR…), technology, primary fuel, storage flag
- **How much:** connection capacity MW, de-rated capacity MW, capacity obligation MW, credit cover
- **Agreement:** awarded or not, agreement ID, duration (years), delivery years, issue date, FCM and long-stop dates, termination and suspension
- **Components:** component ID, description, technology class, MW, location, postcode district, OS grid reference

### Who is it for?

- **BESS and flexibility developers:** see who won T-4/T-1 agreements, at what size and where
- **Traders, aggregators and VPPs:** track competitors' capacity portfolios and obligations
- **Investors, lenders and consultants:** due diligence on projects, parents and agreement terms
- **Analysts and journalists:** technology mix and new-build pipeline by delivery year

### How to use it

1. Click **Try for free** / **Start**.
2. Choose delivery years and auction types, and optionally technology keywords (e.g. `Storage`, `DSR`) or company keywords (e.g. a parent company name).
3. Set **Max results** to cap the run and your cost.
4. Run it, then export as JSON, CSV or Excel, or read the results through the Apify API.

### Input example

```json
{"deliveryYears": [2029], "auctionTypes": ["T-4"], "technologyKeywords": ["Storage"], "agreementAwardedOnly": true, "maxItems": 100}
```

### Input reference

| Field | Description |
|---|---|
| deliveryYears | e.g. `[2028, 2029]` (2029 = Oct 2029–Sep 2030). Empty = all. |
| auctionTypes | T-4, T-3, T-1, TR, ST. Empty = all. |
| technologyKeywords | e.g. "Storage", "DSR", "CCGT", "Solar". |
| companyKeywords | Applicant / parent / holder / agent / CMU name, e.g. "Statkraft". |
| cmuIds | Exact CMU IDs. |
| agreementAwardedOnly / prequalifiedOnly / excludeTerminated | Status filters. |
| minDeRatedCapacityMw | Minimum de-rated MW. |
| includeComponents | Attach component sites (default on, no extra charge). |
| maxItems | Stop after N CMUs (default 500). |

### Output example

One dataset item per CMU. This record is from a real test run (first component shown):

```json
{
  "applicationId": "A-T-4-2029-10TEAL-00001",
  "cmuId": "10TEAL",
  "cmuName": "Tealing",
  "auctionName": "2029-30 (T-4) Four Year Ahead Capacity Auction",
  "auctionType": "T-4",
  "deliveryYear": 2029,
  "applicant": "GPC 1039 LTD",
  "parentCompany": "Apatura Battery Ltd",
  "agent": null,
  "registeredHolder": "GPC 1039 LTD",
  "transmissionOrDistribution": "Transmission",
  "cmuType": "CMRS",
  "cmuCategory": "New Build Generating CMU",
  "technology": "Storage (Duration 2h)",
  "primaryFuel": "Storage - Battery",
  "storage": true,
  "prequalificationDecision": "Prequalified",
  "optOutStatus": "Opt-In",
  "connectionCapacityMw": 67,
  "deRatedCapacityMw": 14.727,
  "capacityAgreementAwarded": true,
  "agreementId": "CAN-2029-10TEAL-001",
  "agreementDurationYears": 15,
  "agreementIssueDate": "07/04/2026",
  "agreementTerm": "15",
  "agreementDeliveryYears": "2029/2030, 2030/2031, 2031/2032, 2032/2033, 2033/2034, 2034/2035, 2035/2036, 2036/2037, 2037/2038, 2038/2039, 2039/2040, 2040/2041, 2041/2042, 2042/2043, 2043/2…",
  "capacityObligationMw": 14.727,
  "fcmRequired": true,
  "fcmDate": "20/07/2027",
  "minimumCompletionLongStopDate": "01/10/2030",
  "creditCoverGbp": 147270,
  "terminated": null,
  "terminationDate": null,
  "suspended": null,
  "components": [
    {
      "componentId": "TEAL10",
      "description": "Front of meter BESS plant. The Connection Capacity stated is lower than the BESS capacity and the connection agreement - this is to allow for degradation of the battery over 15 years in order to pass the Extended Performance Test.",
      "technologyClass": "Storage (Duration 2h)",
      "primaryFuel": "Storage - Battery",
      "connectionCapacityMw": 67,
      "deRatedCapacityMw": 14.727,
      "location": "Myreton BESS, Land at Balnuith, Myreton of Claverhouse, Tealing, DD3",
      "postcodeDistrict": "DD3",
      "osGridReference": "NO 396 371"
    }
  ],
  "componentCount": 1,
  "sourceUrl": "https://www.neso.energy/data-portal/capacity-market-register",
  "attribution": "Supported by National Energy SO Open Data",
  "license": "National Energy SO Open Data Licence v1.0 (https://www.neso.energy/data-portal/neso-open-licence)",
  "sourceUpdatedAt": "2026-10-28T08:47:58.881976",
  "scrapedAt": "2026-10-29T12:05:40.032Z"
}
```

Newest delivery year first.

### How much does it cost?

Pay per result: **$0.005 per CMU record ($5 per 1,000)**. Components are included free. Filtering happens server-side, so you only pay for matching CMUs. Set a max charge per run and the Actor stops cleanly when it is reached.

| CMU records | Cost |
|---|---|
| 100 | $0.50 |
| 1,000 | $5.00 |
| 10,000 | $50.00 |

### Coverage

All CMUs in the NESO Capacity Market Register (CMU + Component resources), all auctions and delivery years published by NESO. Refreshed by NESO as auctions and agreement changes are processed; each record carries `sourceUpdatedAt`.

### Legal and data protection

Source: the [NESO Data Portal](https://www.neso.energy/data-portal) (National Energy System Operator), published under the **NESO Open Data Licence v1.0** (based on the Open Government Licence v3.0): *"You are free to: copy, publish, distribute and transmit the Information; adapt the Information; exploit the Information commercially and non-commercially for example, by combining it with other Information, or by including it in your own product or application."* Every record carries the required attribution **"Supported by National Energy SO Open Data"** and a link to the source dataset. This Actor is not affiliated with or endorsed by NESO.

The Actor uses NESO's official CKAN API only (no scraping, no login) and follows NESO's rate guidance (at most two datastore requests per minute), so multi-source runs take ~30 s per extra query.

**Organisation data only:** the register's "secondary trading contact" telephone/email columns and security-interest fields are **never requested or output** (some contain personal emails). Full postcodes in component locations are cut to the postcode **district** (outward code). You are responsible for your own UK GDPR compliance.

### FAQ

- **Why a CMU per record rather than per component?** That's how agreements are awarded. Components are nested, so a 300-component DSR CMU is still one result.
- **Is this the official data?** Yes. It reads NESO's own datastore, the same data behind the Capacity Market Register CSV.
- **Is NESO the same as National Grid ESO?** Yes. The Electricity System Operator became the National Energy System Operator (NESO) in October 2024.
- **Can I schedule it?** Yes. Use Apify Schedules (e.g. weekly) and integrations (webhooks, Make, Zapier, Google Sheets) to push updates where you need them.
- **Need another field or dataset?** Open an issue on the Actor page.

# Actor input Schema

## `deliveryYears` (type: `array`):

Delivery year(s) the capacity starts (e.g. 2029 = Oct 2029 – Sep 2030). Empty = all years.

## `auctionTypes` (type: `array`):

Empty = all auctions.

## `technologyKeywords` (type: `array`):

Match CMU technology, primary fuel or category, e.g. "Storage", "Battery", "DSR", "CCGT", "Solar", "Interconnector".

## `companyKeywords` (type: `array`):

Match applicant, parent company, registered holder, agent or CMU name, e.g. "Statkraft", "Zenobe", "Flexitricity".

## `cmuIds` (type: `array`):

Exact CMU IDs to look up.

## `agreementAwardedOnly` (type: `boolean`):

Only CMUs awarded a capacity agreement.

## `prequalifiedOnly` (type: `boolean`):

Only prequalified CMUs.

## `excludeTerminated` (type: `boolean`):

Exclude terminated agreements.

## `minDeRatedCapacityMw` (type: `integer`):

Optional.

## `includeComponents` (type: `boolean`):

Attach each CMU's components (site description, location, postcode district, OS grid ref, technology class). Adds ~30s per run (NESO rate guidance).

## `maxItems` (type: `integer`):

Stop after this many CMU records (0 = no limit). You are charged per result.

## Actor input object example

```json
{
  "deliveryYears": [
    "2029",
    "2028"
  ],
  "agreementAwardedOnly": false,
  "prequalifiedOnly": false,
  "excludeTerminated": false,
  "includeComponents": true,
  "maxItems": 500
}
```

# Actor output Schema

## `results` (type: `string`):

All results in the default dataset, shown with the Overview table view by default.

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "deliveryYears": [
        "2029",
        "2028"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("ukopendatatools/gb-capacity-market-register").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "deliveryYears": [
        "2029",
        "2028",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("ukopendatatools/gb-capacity-market-register").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "deliveryYears": [
    "2029",
    "2028"
  ]
}' |
apify call ukopendatatools/gb-capacity-market-register --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,ukopendatatools/gb-capacity-market-register"
        }
    }
}
```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/lfXeJcqfJGF2pO6oF/builds/f9Kbf7KDxFg27y9f1/openapi.json