docs(openapi): add Human in the Loop API endpoints

Add HITL pause/resume endpoints to the OpenAPI spec covering
the full workflow pause lifecycle: listing paused executions,
inspecting pause details, and resuming with input.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Waleed Latif
2026-04-09 13:47:11 -07:00
parent 7bd271ae5b
commit 827d1730c9

View File

@@ -25,6 +25,10 @@
"name": "Workflows",
"description": "Execute workflows and manage workflow resources"
},
{
"name": "Human in the Loop",
"description": "Manage paused workflow executions and resume them with input"
},
{
"name": "Logs",
"description": "Query execution logs and retrieve details"
@@ -235,6 +239,497 @@
}
}
},
"/api/workflows/{id}/paused": {
"get": {
"operationId": "listPausedExecutions",
"summary": "List Paused Executions",
"description": "List all paused executions for a workflow. Workflows pause at Human in the Loop blocks and wait for input before continuing. Use this endpoint to discover which executions need attention.",
"tags": ["Human in the Loop"],
"x-codeSamples": [
{
"id": "curl",
"label": "cURL",
"lang": "bash",
"source": "curl -X GET \\\n \"https://www.sim.ai/api/workflows/{id}/paused?status=paused\" \\\n -H \"X-API-Key: YOUR_API_KEY\""
}
],
"parameters": [
{
"name": "id",
"in": "path",
"required": true,
"description": "The unique identifier of the workflow.",
"schema": {
"type": "string",
"example": "wf_1a2b3c4d5e"
}
},
{
"name": "status",
"in": "query",
"required": false,
"description": "Filter paused executions by status.",
"schema": {
"type": "string",
"example": "paused"
}
}
],
"responses": {
"200": {
"description": "List of paused executions.",
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"pausedExecutions": {
"type": "array",
"items": {
"$ref": "#/components/schemas/PausedExecutionSummary"
}
}
}
},
"example": {
"pausedExecutions": [
{
"id": "pe_abc123",
"workflowId": "wf_1a2b3c4d5e",
"executionId": "exec_9f8e7d6c5b",
"status": "paused",
"totalPauseCount": 1,
"resumedCount": 0,
"pausedAt": "2026-01-15T10:30:00Z",
"updatedAt": "2026-01-15T10:30:00Z",
"expiresAt": null,
"metadata": null,
"triggerIds": [],
"pausePoints": [
{
"contextId": "ctx_xyz789",
"blockId": "block_hitl_1",
"registeredAt": "2026-01-15T10:30:00Z",
"resumeStatus": "paused",
"snapshotReady": true,
"resumeLinks": {
"apiUrl": "https://www.sim.ai/api/resume/wf_1a2b3c4d5e/exec_9f8e7d6c5b/ctx_xyz789",
"uiUrl": "https://www.sim.ai/resume/wf_1a2b3c4d5e/exec_9f8e7d6c5b",
"contextId": "ctx_xyz789",
"executionId": "exec_9f8e7d6c5b",
"workflowId": "wf_1a2b3c4d5e"
},
"response": {
"displayData": {
"title": "Approval Required",
"message": "Please review this request"
},
"formFields": []
}
}
]
}
]
}
}
}
},
"400": {
"$ref": "#/components/responses/BadRequest"
},
"401": {
"$ref": "#/components/responses/Unauthorized"
},
"404": {
"$ref": "#/components/responses/NotFound"
}
}
}
},
"/api/workflows/{id}/paused/{executionId}": {
"get": {
"operationId": "getPausedExecution",
"summary": "Get Paused Execution",
"description": "Get detailed information about a specific paused execution, including its pause points, execution snapshot, and resume queue. Use this to inspect the state before resuming.",
"tags": ["Human in the Loop"],
"x-codeSamples": [
{
"id": "curl",
"label": "cURL",
"lang": "bash",
"source": "curl -X GET \\\n \"https://www.sim.ai/api/workflows/{id}/paused/{executionId}\" \\\n -H \"X-API-Key: YOUR_API_KEY\""
}
],
"parameters": [
{
"name": "id",
"in": "path",
"required": true,
"description": "The unique identifier of the workflow.",
"schema": {
"type": "string",
"example": "wf_1a2b3c4d5e"
}
},
{
"name": "executionId",
"in": "path",
"required": true,
"description": "The execution ID of the paused execution.",
"schema": {
"type": "string",
"example": "exec_9f8e7d6c5b"
}
}
],
"responses": {
"200": {
"description": "Paused execution details.",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/PausedExecutionDetail"
}
}
}
},
"401": {
"$ref": "#/components/responses/Unauthorized"
},
"404": {
"$ref": "#/components/responses/NotFound"
}
}
}
},
"/api/resume/{workflowId}/{executionId}": {
"get": {
"operationId": "getPausedExecutionByResumePath",
"summary": "Get Paused Execution (Resume Path)",
"description": "Get detailed information about a specific paused execution using the resume URL path. Returns the same data as the workflow paused execution detail endpoint.",
"tags": ["Human in the Loop"],
"x-codeSamples": [
{
"id": "curl",
"label": "cURL",
"lang": "bash",
"source": "curl -X GET \\\n \"https://www.sim.ai/api/resume/{workflowId}/{executionId}\" \\\n -H \"X-API-Key: YOUR_API_KEY\""
}
],
"parameters": [
{
"name": "workflowId",
"in": "path",
"required": true,
"description": "The unique identifier of the workflow.",
"schema": {
"type": "string",
"example": "wf_1a2b3c4d5e"
}
},
{
"name": "executionId",
"in": "path",
"required": true,
"description": "The execution ID of the paused execution.",
"schema": {
"type": "string",
"example": "exec_9f8e7d6c5b"
}
}
],
"responses": {
"200": {
"description": "Paused execution details.",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/PausedExecutionDetail"
}
}
}
},
"401": {
"$ref": "#/components/responses/Unauthorized"
},
"404": {
"$ref": "#/components/responses/NotFound"
}
}
}
},
"/api/resume/{workflowId}/{executionId}/{contextId}": {
"get": {
"operationId": "getPauseContext",
"summary": "Get Pause Context",
"description": "Get detailed information about a specific pause context within a paused execution. Returns the pause point details, resume queue state, and any active resume entry.",
"tags": ["Human in the Loop"],
"x-codeSamples": [
{
"id": "curl",
"label": "cURL",
"lang": "bash",
"source": "curl -X GET \\\n \"https://www.sim.ai/api/resume/{workflowId}/{executionId}/{contextId}\" \\\n -H \"X-API-Key: YOUR_API_KEY\""
}
],
"parameters": [
{
"name": "workflowId",
"in": "path",
"required": true,
"description": "The unique identifier of the workflow.",
"schema": {
"type": "string",
"example": "wf_1a2b3c4d5e"
}
},
{
"name": "executionId",
"in": "path",
"required": true,
"description": "The execution ID of the paused execution.",
"schema": {
"type": "string",
"example": "exec_9f8e7d6c5b"
}
},
{
"name": "contextId",
"in": "path",
"required": true,
"description": "The pause context ID to retrieve details for.",
"schema": {
"type": "string",
"example": "ctx_xyz789"
}
}
],
"responses": {
"200": {
"description": "Pause context details.",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/PauseContextDetail"
}
}
}
},
"401": {
"$ref": "#/components/responses/Unauthorized"
},
"404": {
"$ref": "#/components/responses/NotFound"
}
}
},
"post": {
"operationId": "resumeExecution",
"summary": "Resume Execution",
"description": "Resume a paused workflow execution by providing input for a specific pause context. The execution continues from where it paused, using the provided input. Supports synchronous, asynchronous, and streaming modes (determined by the original execution's configuration).",
"tags": ["Human in the Loop"],
"x-codeSamples": [
{
"id": "curl",
"label": "cURL",
"lang": "bash",
"source": "curl -X POST \\\n \"https://www.sim.ai/api/resume/{workflowId}/{executionId}/{contextId}\" \\\n -H \"X-API-Key: YOUR_API_KEY\" \\\n -H \"Content-Type: application/json\" \\\n -d '{\n \"input\": {\n \"approved\": true,\n \"comment\": \"Looks good to me\"\n }\n }'"
}
],
"parameters": [
{
"name": "workflowId",
"in": "path",
"required": true,
"description": "The unique identifier of the workflow.",
"schema": {
"type": "string",
"example": "wf_1a2b3c4d5e"
}
},
{
"name": "executionId",
"in": "path",
"required": true,
"description": "The execution ID of the paused execution.",
"schema": {
"type": "string",
"example": "exec_9f8e7d6c5b"
}
},
{
"name": "contextId",
"in": "path",
"required": true,
"description": "The pause context ID to resume. Found in the pause point's contextId field or resumeLinks.",
"schema": {
"type": "string",
"example": "ctx_xyz789"
}
}
],
"requestBody": {
"description": "Input data for the resumed execution. The structure depends on the workflow's Human in the Loop block configuration.",
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"input": {
"type": "object",
"description": "Key-value pairs to pass as input to the resumed execution. If omitted, the entire request body is used as input.",
"additionalProperties": true
}
}
},
"example": {
"input": {
"approved": true,
"comment": "Looks good to me"
}
}
}
}
},
"responses": {
"200": {
"description": "Resume execution completed synchronously, or resume was queued behind another in-progress resume.",
"content": {
"application/json": {
"schema": {
"oneOf": [
{
"$ref": "#/components/schemas/ResumeResult"
},
{
"type": "object",
"description": "Resume has been queued behind another in-progress resume.",
"properties": {
"status": {
"type": "string",
"enum": ["queued"],
"description": "Indicates the resume is queued."
},
"executionId": {
"type": "string",
"description": "The execution ID assigned to this resume."
},
"queuePosition": {
"type": "integer",
"description": "Position in the resume queue."
},
"message": {
"type": "string",
"description": "Human-readable status message."
}
}
},
{
"type": "object",
"description": "Resume execution started (non-API-key callers). The execution runs asynchronously.",
"properties": {
"status": {
"type": "string",
"enum": ["started"],
"description": "Indicates the resume execution has started."
},
"executionId": {
"type": "string",
"description": "The execution ID for the resumed workflow."
},
"message": {
"type": "string",
"description": "Human-readable status message."
}
}
}
]
},
"examples": {
"sync": {
"summary": "Synchronous completion",
"value": {
"success": true,
"status": "completed",
"executionId": "exec_new123",
"output": {
"result": "Approved and processed"
},
"error": null,
"metadata": {
"duration": 850,
"startTime": "2026-01-15T10:35:00Z",
"endTime": "2026-01-15T10:35:01Z"
}
}
},
"queued": {
"summary": "Queued behind another resume",
"value": {
"status": "queued",
"executionId": "exec_new123",
"queuePosition": 2,
"message": "Resume queued. It will run after current resumes finish."
}
},
"started": {
"summary": "Execution started (fire and forget)",
"value": {
"status": "started",
"executionId": "exec_new123",
"message": "Resume execution started."
}
}
}
}
}
},
"202": {
"description": "Resume execution has been queued for asynchronous processing. Poll the statusUrl for results.",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/AsyncExecutionResult"
},
"example": {
"success": true,
"async": true,
"jobId": "job_4a3b2c1d0e",
"executionId": "exec_new123",
"message": "Resume execution queued",
"statusUrl": "https://www.sim.ai/api/jobs/job_4a3b2c1d0e"
}
}
}
},
"400": {
"$ref": "#/components/responses/BadRequest"
},
"401": {
"$ref": "#/components/responses/Unauthorized"
},
"404": {
"$ref": "#/components/responses/NotFound"
},
"503": {
"description": "Failed to queue the resume execution. Retry the request.",
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"error": {
"type": "string",
"description": "Error message."
}
}
}
}
}
}
}
}
},
"/api/v1/workflows": {
"get": {
"operationId": "listWorkflows",
@@ -5788,6 +6283,346 @@
"description": "Upper bound value for 'between' operator."
}
}
},
"PausedExecutionSummary": {
"type": "object",
"description": "Summary of a paused workflow execution.",
"properties": {
"id": {
"type": "string",
"description": "Unique identifier for the paused execution record."
},
"workflowId": {
"type": "string",
"description": "The workflow this execution belongs to."
},
"executionId": {
"type": "string",
"description": "The execution that was paused."
},
"status": {
"type": "string",
"description": "Current status of the paused execution.",
"example": "paused"
},
"totalPauseCount": {
"type": "integer",
"description": "Total number of pause points in this execution."
},
"resumedCount": {
"type": "integer",
"description": "Number of pause points that have been resumed."
},
"pausedAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When the execution was paused."
},
"updatedAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When the paused execution record was last updated."
},
"expiresAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When the paused execution will expire and be cleaned up."
},
"metadata": {
"type": "object",
"nullable": true,
"description": "Additional metadata associated with the paused execution.",
"additionalProperties": true
},
"triggerIds": {
"type": "array",
"items": {
"type": "string"
},
"description": "IDs of triggers that initiated the original execution."
},
"pausePoints": {
"type": "array",
"items": {
"$ref": "#/components/schemas/PausePoint"
},
"description": "List of pause points in the execution."
}
}
},
"PausePoint": {
"type": "object",
"description": "A point in the workflow where execution has been paused awaiting human input.",
"properties": {
"contextId": {
"type": "string",
"description": "Unique identifier for this pause context. Used when resuming execution."
},
"blockId": {
"type": "string",
"description": "The block ID where execution paused."
},
"response": {
"description": "Data returned by the block before pausing, including display data and form fields."
},
"registeredAt": {
"type": "string",
"format": "date-time",
"description": "When this pause point was registered."
},
"resumeStatus": {
"type": "string",
"enum": ["paused", "resumed", "failed", "queued", "resuming"],
"description": "Current status of this pause point."
},
"snapshotReady": {
"type": "boolean",
"description": "Whether the execution snapshot is ready for resumption."
},
"resumeLinks": {
"type": "object",
"description": "Links for resuming this pause point.",
"properties": {
"apiUrl": {
"type": "string",
"format": "uri",
"description": "API endpoint URL to POST resume input to."
},
"uiUrl": {
"type": "string",
"format": "uri",
"description": "UI URL for a human to review and approve."
},
"contextId": {
"type": "string",
"description": "The context ID for this pause point."
},
"executionId": {
"type": "string",
"description": "The execution ID."
},
"workflowId": {
"type": "string",
"description": "The workflow ID."
}
}
},
"queuePosition": {
"type": "integer",
"nullable": true,
"description": "Position in the resume queue, if queued."
},
"latestResumeEntry": {
"$ref": "#/components/schemas/ResumeQueueEntry",
"nullable": true,
"description": "The most recent resume queue entry for this pause point."
},
"parallelScope": {
"type": "object",
"description": "Scope information when the pause occurs inside a parallel branch.",
"properties": {
"parallelId": {
"type": "string",
"description": "Identifier of the parallel execution group."
},
"branchIndex": {
"type": "integer",
"description": "Index of the branch within the parallel group."
},
"branchTotal": {
"type": "integer",
"description": "Total number of branches in the parallel group."
}
}
},
"loopScope": {
"type": "object",
"description": "Scope information when the pause occurs inside a loop.",
"properties": {
"loopId": {
"type": "string",
"description": "Identifier of the loop."
},
"iteration": {
"type": "integer",
"description": "Current loop iteration number."
}
}
}
}
},
"ResumeQueueEntry": {
"type": "object",
"description": "An entry in the resume execution queue.",
"properties": {
"id": {
"type": "string",
"description": "Unique identifier for this queue entry."
},
"pausedExecutionId": {
"type": "string",
"description": "The paused execution this entry belongs to."
},
"parentExecutionId": {
"type": "string",
"description": "The original execution that was paused."
},
"newExecutionId": {
"type": "string",
"description": "The new execution ID created for the resume."
},
"contextId": {
"type": "string",
"description": "The pause context ID being resumed."
},
"resumeInput": {
"description": "The input provided when resuming."
},
"status": {
"type": "string",
"description": "Status of this queue entry (e.g., pending, claimed, completed, failed)."
},
"queuedAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When the entry was added to the queue."
},
"claimedAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When execution started processing this entry."
},
"completedAt": {
"type": "string",
"format": "date-time",
"nullable": true,
"description": "When execution completed."
},
"failureReason": {
"type": "string",
"nullable": true,
"description": "Reason for failure, if the resume failed."
}
}
},
"PausedExecutionDetail": {
"type": "object",
"description": "Detailed information about a paused execution, including the execution snapshot and resume queue.",
"allOf": [
{
"$ref": "#/components/schemas/PausedExecutionSummary"
},
{
"type": "object",
"properties": {
"executionSnapshot": {
"type": "object",
"description": "Serialized execution state for resumption.",
"properties": {
"snapshot": {
"type": "string",
"description": "Serialized execution snapshot data."
},
"triggerIds": {
"type": "array",
"items": {
"type": "string"
},
"description": "Trigger IDs from the snapshot."
}
}
},
"queue": {
"type": "array",
"items": {
"$ref": "#/components/schemas/ResumeQueueEntry"
},
"description": "Resume queue entries for this execution."
}
}
}
]
},
"PauseContextDetail": {
"type": "object",
"description": "Detailed information about a specific pause context within a paused execution.",
"properties": {
"execution": {
"$ref": "#/components/schemas/PausedExecutionSummary",
"description": "Summary of the parent paused execution."
},
"pausePoint": {
"$ref": "#/components/schemas/PausePoint",
"description": "The specific pause point for this context."
},
"queue": {
"type": "array",
"items": {
"$ref": "#/components/schemas/ResumeQueueEntry"
},
"description": "Resume queue entries for this context."
},
"activeResumeEntry": {
"$ref": "#/components/schemas/ResumeQueueEntry",
"nullable": true,
"description": "The currently active resume entry, if any."
}
}
},
"ResumeResult": {
"type": "object",
"description": "Result of a synchronous resume execution.",
"properties": {
"success": {
"type": "boolean",
"description": "Whether the resume execution completed successfully."
},
"status": {
"type": "string",
"description": "Execution status.",
"enum": ["completed", "failed", "paused", "cancelled"],
"example": "completed"
},
"executionId": {
"type": "string",
"description": "The new execution ID for the resumed workflow."
},
"output": {
"type": "object",
"description": "Workflow output from the resumed execution.",
"additionalProperties": true
},
"error": {
"type": "string",
"nullable": true,
"description": "Error message if the execution failed."
},
"metadata": {
"type": "object",
"description": "Execution timing metadata.",
"properties": {
"duration": {
"type": "integer",
"description": "Total execution duration in milliseconds."
},
"startTime": {
"type": "string",
"format": "date-time",
"description": "When the resume execution started."
},
"endTime": {
"type": "string",
"format": "date-time",
"description": "When the resume execution completed."
}
}
}
}
}
},
"responses": {