--- title: "BigChange API: connect it to your AI chat ยท Hypamoon" description: "The BigChange API is documented, but access goes through BigChange first. What it takes to connect it to your AI chat with Hypamoon, with sources." url: https://hypamoon.com/connect-to/bigchange --- 1. [Connect to](https://hypamoon.com/connect-to) 2. BigChange Construction and field service # Connect BigChange to Hypamoon Possible, with help from BigChange. The API is documented, but you cannot just create a key: access goes through BigChange first. Possible ## The check Three questions about the API of BigChange, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://documentation.ops.bigchange.com/docs/rest/api-reference) **A key you create yourself**\ **No.** A customer ID header is issued once a BigChange customer approves your application; developers start with a sandbox customer ID from BigChange. [documentation.ops.bigchange.com](https://documentation.ops.bigchange.com/docs/rest/quick-start) **Versions or a changelog**\ **Yes.** REST API version v1; older web services stay available. [documentation.ops.bigchange.com](https://documentation.ops.bigchange.com/docs/get-started) **How it signs in**\ OAuth 2.0 client credentials plus a customer ID header. **Webhooks**\ **Not confirmed.** **Hosting**\ Cloud **Condition**\ Application credentials and the customer ID come from BigChange after approval. ## What you can build Create jobs in BigChange from your own service request form, and get a daily list of jobs that missed their slot. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - BigChange signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for BigChange takes more work: ask your chat to check this first. - UK job management platform. A developer Discord is available for questions. ## Try it in your chat First get access from BigChange. Then fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for BigChange. API docs: https://documentation.ops.bigchange.com/docs/get-started. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20BigChange.%20API%20docs%3A%20https%3A%2F%2Fdocumentation.ops.bigchange.com%2Fdocs%2Fget-started.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 7 November 2026. - [documentation.ops.bigchange.com/docs/rest/api-reference](https://documentation.ops.bigchange.com/docs/rest/api-reference) - [documentation.ops.bigchange.com/docs/rest/quick-start](https://documentation.ops.bigchange.com/docs/rest/quick-start) - [documentation.ops.bigchange.com/docs/get-started](https://documentation.ops.bigchange.com/docs/get-started) BigChange is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with BigChange. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in construction and field service - [**Bouw7** Possible](https://hypamoon.com/connect-to/bouw7) - [**Housecall Pro** Open](https://hypamoon.com/connect-to/housecall-pro) - [**Jobber** Open](https://hypamoon.com/connect-to/jobber) - [**Procore** Open](https://hypamoon.com/connect-to/procore) - [**ServiceM8** Open](https://hypamoon.com/connect-to/servicem8) - [**ServiceTitan** Possible](https://hypamoon.com/connect-to/servicetitan) - [**Simpro** Possible](https://hypamoon.com/connect-to/simpro) - [**Commusoft** Open](https://hypamoon.com/connect-to/commusoft) - [**Tradecloud** Possible](https://hypamoon.com/connect-to/tradecloud) - [**Workiz** Open](https://hypamoon.com/connect-to/workiz) - [**Fergus** Open](https://hypamoon.com/connect-to/fergus) - [**AroFlo** Open](https://hypamoon.com/connect-to/aroflo) - [**Joblogic** Possible](https://hypamoon.com/connect-to/joblogic) - [**Service Fusion** Open](https://hypamoon.com/connect-to/service-fusion) - [**Zuper** Open](https://hypamoon.com/connect-to/zuper) - [**FieldEdge** Possible](https://hypamoon.com/connect-to/fieldedge) - [**ServiceTrade** Possible](https://hypamoon.com/connect-to/servicetrade) - [**Tradify** Closed](https://hypamoon.com/connect-to/tradify) - [**Praxedo** Open](https://hypamoon.com/connect-to/praxedo) - [**Fieldwire** Open](https://hypamoon.com/connect-to/fieldwire) - [**UpKeep** Open](https://hypamoon.com/connect-to/upkeep) - [**AccuLynx** Possible](https://hypamoon.com/connect-to/acculynx) - [**Aspire** Open](https://hypamoon.com/connect-to/aspire) - [**Skedulo** Open](https://hypamoon.com/connect-to/skedulo) - [**Dalux** Possible](https://hypamoon.com/connect-to/dalux) - [**Fiix** Open](https://hypamoon.com/connect-to/fiix) - [**Limble CMMS** Open](https://hypamoon.com/connect-to/limble-cmms) - [**HERO Software** Possible](https://hypamoon.com/connect-to/hero-software) - [**MaintainX** Open](https://hypamoon.com/connect-to/maintainx) - [**BIMcollab** Possible](https://hypamoon.com/connect-to/bimcollab) - [**Contractor Foreman** Closed](https://hypamoon.com/connect-to/contractor-foreman) - [**PlanRadar** Open](https://hypamoon.com/connect-to/planradar) - [**plancraft** Closed](https://hypamoon.com/connect-to/plancraft) - [**Capmo** Open](https://hypamoon.com/connect-to/capmo) - [**Bouwsoft** Closed](https://hypamoon.com/connect-to/bouwsoft) - [**Craftnote** Open](https://hypamoon.com/connect-to/craftnote) - [**openHandwerk** Closed](https://hypamoon.com/connect-to/openhandwerk) - [**Fieldcode** Possible](https://hypamoon.com/connect-to/fieldcode) - [**4PS Construct** Possible](https://hypamoon.com/connect-to/4ps-construct) - [**Obat** Closed](https://hypamoon.com/connect-to/obat) - [**Tolteck** Closed](https://hypamoon.com/connect-to/tolteck) - [**Extrabat** Closed](https://hypamoon.com/connect-to/extrabat) - [**Kraan** Closed](https://hypamoon.com/connect-to/kraan) - [**Knowify** Closed](https://hypamoon.com/connect-to/knowify) - [**Autodesk Construction Cloud (Forma APIs)** Open](https://hypamoon.com/connect-to/autodesk-construction-cloud) [All 1094 tools](https://hypamoon.com/connect-to) ## Tool not listed? Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect BigChange? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=bigchange) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~bigchange#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~bigchange#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)