# Deltek Costpoint REST API: Documentation, Authentication and Examples > Source: https://netray.co/erp-help/deltek-costpoint-rest-api > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: ERP Help ## Short answer Costpoint exposes web services and a REST-style API for reading and writing business objects with Costpoint's validation and security applied. Documentation is provided to Deltek customers and partners through Deltek's support and developer channels rather than a public page, and authentication depends on your release and whether SSO is in use. Treat any example as a pattern and confirm endpoint names against your documentation. ## Kind advanced ## System deltek ## Erp Deltek Costpoint ## Module REST API / Web Services ## Query deltek costpoint rest api ## Alternate Queries - deltek costpoint api documentation - deltek costpoint rest api documentation - costpoint api authentication ## Applies To Deltek Costpoint 8.x web services and REST capabilities; availability and object coverage depend on release and licence ## Steps ### Getting started with the Costpoint API **Items:** - Obtain the API documentation for your release from the Deltek Support Portal or your Deltek contact, since it is not freely published. - Confirm API access is enabled for your environment and licensed, and which objects are exposed. - Create a dedicated service account in Costpoint with a narrow security role matching the objects you need. - Authenticate as your documentation specifies and call a harmless read endpoint first to prove connectivity. - Implement paging and filtering for list calls so you do not pull entire tables. - For writes, send complete valid payloads and handle validation errors returned by Costpoint business rules. - Test against a non-production environment, then add logging, retries with backoff and reconciliation. ## Sections ### What the API gives you, and what it does not **Body:** The value of a supported API is that Costpoint applies its own rules: required fields, valid accounts, open periods, security. A write that succeeds through the API is a write that Costpoint accepts as valid, which is the reason to prefer it over database access. The trade-off is that coverage is bounded by the objects Deltek exposes, so some screens may have no endpoint. Before designing around the API, list the exact objects you need and confirm each is covered for read and write in your release. If something is missing, the alternatives are batch import processes, reporting extracts, or asking Deltek about roadmap and partner solutions. ### Authentication and environments **Body:** Authentication details depend on release and configuration, and may involve Costpoint credentials, tokens or an identity provider when SSO is enabled. Follow your documentation exactly and do not reuse a human user's credentials. Store secrets in a vault, not in code or scripts. Keep a separate non-production Costpoint for development. Data shape matters more than volume, so refresh it from production with sensitive data handled according to your policy. For contractors with CUI, the machine calling the API is part of your boundary. **Code:** # Illustrative pattern only. Confirm host, path, auth and fields in your Deltek documentation. curl -X GET "https:////?pageSize=50" \ -H "Authorization: " \ -H "Accept: application/json" ### Design practices that save you later **Body:** Use stable external keys so retries do not duplicate transactions, keep each call small, and log request IDs and responses. Treat validation failures as data problems to route to a person, not as transient errors to retry forever. Mind rate and concurrency. Several parallel writers to the same project can cause lock contention, and large reads during billing or close slow everyone. Schedule bulk work off-peak and confirm the load with your Costpoint administrator. ## Pitfalls - Copying endpoint paths from a forum post instead of your release documentation. - Using a personal login for the integration, which breaks on password change. - Pulling entire tables without paging, slowing the production system. - Retrying validation errors forever instead of routing them to a person. - Assuming every Costpoint screen has an equivalent endpoint. ## Ai Angle An API is also how an agent reads Costpoint safely. Netray's pattern is a read-only service account, narrow role, the query or call shown to the user, and human approval before any write-back. Models are open-weight and served on your own GPUs, so cost, labor and contract data never goes to a public AI endpoint. If all you need is a nightly sync, a plain scheduled integration is simpler than an agent. ## Faq ### Where is the Deltek Costpoint REST API documentation? **Answer:** It is provided to Deltek customers and partners through the Deltek Support Portal and developer channels for your release, rather than as an open public page. Ask your Deltek contact or administrator for the version matching your environment. ### How do I authenticate to the Costpoint API? **Answer:** It depends on your release and whether SSO is enabled, so follow your Deltek documentation. In every case use a dedicated service account with a narrow role, store its secret in a vault and never use a named person's login. ### Can I write data through the Costpoint API? **Answer:** For objects that expose write operations, yes, and Costpoint applies its validation and security. Coverage is limited to what Deltek exposes, so confirm each object for read and write in your release before designing around it. ### Is the API better than direct database access? **Answer:** For writes, yes, because it enforces business rules and keeps you on a supported path. Direct writes risk corrupting balances. For high-volume reporting reads, supported extracts or reporting structures may be more efficient than calling an API per record. ## Search terms deltek costpoint rest api, costpoint api documentation, costpoint rest api documentation, costpoint api authentication, costpoint web services, costpoint api service account, costpoint integration api, costpoint odata --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json