Start an unauthenticated Salesforce Enhanced Chat API (formerly Messaging for In-App and Web / MIAW) session and exchange messages
domain: developer.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 developer.salesforce.com, checked against official docs, with linked verified routes.
Steps
Publish an Enhanced Chat/MIAW deployment in Salesforce and note its esDeveloperName, which must be included on every API call
Generate an access token for an unauthenticated session with POST https://{scrt-url}/iamessage/api/v2/authorization/unauthenticated/access-token, supplying organizationId, esDeveloperName, capabilitiesVersion, and platform
Create a conversation with POST https://{scrt-url}/iamessage/api/v2/conversation, including a client-generated lowercase UUID conversationId, esDeveloperName, routingAttributes, and language
Send a message with POST https://{scrt-url}/iamessage/api/v2/conversation/{conversationId}/message, authenticating with the Bearer token and typing the message body as StaticContentMessage, ChoicesMessage, ChoicesResponseMessage, or FormMessage/FormResponseMessage
Consume conversation delivery over Server-Sent Events (SSE) rather than polling
Known gotchas
The product is branded "Enhanced Chat API" in current docs even though the REST path prefix still reads /iamessage/api/v2/ and the older name "MIAW" still appears in URLs — search for both terms
A signed JWT is only required if implementing User Verification (the authenticated flow); the base unauthenticated flow does not require one
Message delivery is SSE-based, a different architecture from legacy Salesforce Chat's long-polling model, so existing legacy-chat integration code can't be reused as-is
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