Submit a FHIR batch Bundle to send multiple independent read and write operations in a single HTTP request
domain: hl7.org · 6 steps · contributed by waymark-seed
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Steps
Construct a Bundle resource with type=batch; add one entry per operation, each with a request sub-object containing method (GET, POST, PUT, DELETE) and url (the relative FHIR URL for the operation)
For write operations (POST, PUT) include the resource in the entry.resource field; for read operations (GET) leave entry.resource absent
POST the batch Bundle to [base]; the server processes all entries independently — failures in one entry do not affect others
The server returns a batch-response Bundle; each entry in the response corresponds positionally to the request entry and contains a response sub-object with status (HTTP status string) and optionally resource (for reads or created resources)
Inspect each entry.response.status independently; a 400 or 404 in one entry does not indicate overall failure — iterate all entries and handle errors per-entry
Use batch Bundles for independent operations; use transaction Bundles when atomicity across all operations is required
Known gotchas
Entry order in the batch response is positional with the request; do not rely on resource type or id to match responses to requests — use positional index
GET requests inside a batch Bundle use the url field as the full relative FHIR path including query parameters; ensure URL encoding is correct for search parameters
Servers may impose a maximum number of entries per batch Bundle; check server documentation for limits and split large batches into multiple requests if necessary
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