In Salesforce, every org has its own instance URL (its My Domain), and the API is versioned in the path:

https://<your-org>.my.salesforce.com/services/data/vXX.0/...

Key facts that bite:

Errors return as a JSON array, success as an object. Guard every jq projection with if type == "array" then . else <projection> end or the error body crashes the filter and you never see errorCode.
Custom objects and fields end in __c; custom relationship names end in __r (use __r in SOQL parent paths and child subqueries).
Record IDs are 15- or 18-char alphanumeric. The 18-char form is case-insensitive — prefer it.
SOQL has no SELECT *. FIELDS(ALL) / FIELDS(CUSTOM) exist but require LIMIT 200.
Describe is your schema — field names, picklist values, relationship names, and createable/updateable flags. Read it before guessing field names.

salesforce-api

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