Function Orchestration
Coordinating the execution order, error handling, and data flow between multiple function calls within an agent's workflow. When an agent needs to call five APIs to complete a task, function orchestration determines which calls can run in parallel, which depend on previous results, how to handle partial failures, and how to retry or fall back gracefully.
Written by Max Zeshut
Founder at Agentmelt · Last updated Oct 26, 2026
Example
A sales agent qualifying a lead calls the CRM (get contact info), enrichment API (company data), intent API (buying signals), and calendar API (availability)—all in parallel. The orchestrator waits for all results before the agent drafts the outreach email.
Frequently asked questions
- How is function orchestration different from workflow orchestration?
- Function orchestration manages individual function/API calls within a single agent step. Workflow orchestration manages higher-level steps across an entire multi-step process. Function orchestration is a building block of workflow orchestration.