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# API Reference

## Docs

- [Displayable Nodes Overview](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes.md): Overview of all Workflows SDK Displayable Node types that support bidirectional synchronization between UI and code.
- [Agent Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/agent-node.md): Simplify tool calling with automatic schema handling and iterative loop logic.
- [Inline Prompt Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/inline-prompt-node.md): Execute prompts directly within workflows without requiring prompt deployments.
- [Inline Subworkflow Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/inline-subworkflow-node.md): Execute subworkflows defined inline within your workflow code.
- [Prompt Deployment Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/prompt-deployment-node.md): Execute deployed prompts from your Prompt Deployment system.
- [Search Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/search-node.md): Perform hybrid search against a Document Index for RAG applications.
- [Subworkflow Deployment Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/subworkflow-deployment-node.md): Execute deployed workflows as subworkflows within parent workflows.
- [API Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/api-node.md): Make HTTP requests to external API endpoints.
- [Code Execution Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/code-execution-node.md): Run custom Python or TypeScript code within your workflows.
- [Templating Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/templating-node.md): Apply Jinja2 templating for lightweight data transformations.
- [Guardrail Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/guardrail-node.md): Run inline evaluations using pre-defined Metrics for quality checks.
- [Map Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/map-node.md): Iterate over arrays, executing subworkflows for each item with parallel processing.
- [Conditional Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/conditional-node.md): Branch workflow execution based on conditions and upstream node results.
- [Merge Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/merge-node.md): Consolidate divergent execution paths using configurable merge strategies.
- [Error Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/error-node.md): Terminate workflow execution and raise custom error messages.
- [Final Output Node](https://docs.vellum.ai/developers/workflows-sdk/api-reference/nodes/final-output-node.md): Stream workflow responses to production endpoints with Expression inputs.
- [Datasets Overview](https://docs.vellum.ai/developers/workflows-sdk/api-reference/datasets.md): Define test scenarios and sample data for local workflow development using DatasetRow, inputs, triggers, and mocks.
- [Mocks](https://docs.vellum.ai/developers/workflows-sdk/api-reference/datasets/mocks.md): Override node outputs during local workflow execution for testing specific scenarios.
- [Vellum CLI](https://docs.vellum.ai/developers/workflows-sdk/api-reference/cli.md): The command line interface for interacting with Vellum.
- [Ping](https://docs.vellum.ai/developers/workflows-sdk/api-reference/cli/ping.md)
- [Pull](https://docs.vellum.ai/developers/workflows-sdk/api-reference/cli/pull.md)
- [Push](https://docs.vellum.ai/developers/workflows-sdk/api-reference/cli/push.md)