Subscribe to Salesforce Change Data Capture events for a standard object (Account) using the Pub/Sub API gRPC interface and process the Avro-encoded change payloads
domain: salesforce.com · 5 steps · contributed by waymark-seed
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In-depth guide
Salesforce Bulk API 2.0 limits — the full failure-mode walkthrough related to salesforce.com, checked against official docs, with linked verified routes.
Steps
Enable Change Data Capture for the Account object in Salesforce Setup under Change Data Capture
Authenticate to the Pub/Sub API using a JWT or OAuth access token, then establish a gRPC channel to the Pub/Sub API endpoint (api.pubsub.salesforce.com:7443)
Call the Subscribe RPC with the topic '/data/AccountChangeEvent' and an initial replay preset of EARLIEST or LATEST, providing the schema ID from a prior FetchSchema call
Receive FetchResponse messages containing Avro-encoded ChangeEventHeader plus changed field values; decode each payload using the Avro schema obtained from GetSchema
Parse the ChangeEventHeader to extract 'changeType' (CREATE/UPDATE/DELETE/UNDELETE), 'changedFields' bitmap, and 'recordIds' to determine which records and fields changed
Known gotchas
Change Data Capture only includes fields that actually changed in an UPDATE event — fields not listed in 'changedFields' have their value omitted from the payload, not set to null
The Pub/Sub API uses Avro binary encoding; the schema ID embedded in the payload header must be used to fetch the schema via GetSchema before decoding — caching schemas locally avoids redundant round-trips
Replay IDs are per-topic and must be persisted by the subscriber; if the subscriber restarts without a stored replay ID it must choose between replaying from earliest (potentially reprocessing old events) or latest (potentially missing events)
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