---
id: workflow-signal-send
title: "Send a signal to an execution"
description: "Delivers a signal to an execution waiting on it. The request body is passed through verbatim as the signal payload. Returns 409 when the execution is not waiting on that signal."
sidebar_label: "Send a signal to an execution"
hide_title: true
hide_table_of_contents: true
api: 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
sidebar_class_name: "post api-method"
info_path: docs/api/workflows
custom_edit_url: null
---

import MethodEndpoint from "@theme/ApiExplorer/MethodEndpoint";
import ParamsDetails from "@theme/ParamsDetails";
import RequestSchema from "@theme/RequestSchema";
import StatusCodes from "@theme/StatusCodes";
import OperationTabs from "@theme/OperationTabs";
import TabItem from "@theme/TabItem";
import Heading from "@theme/Heading";

<Heading
  as={"h1"}
  className={"openapi__heading"}
  children={"Send a signal to an execution"}
>
</Heading>

<MethodEndpoint
  method={"post"}
  path={"/workflows/executions/{id}/signals/{name}"}
  context={"endpoint"}
>
  
</MethodEndpoint>



Delivers a signal to an execution waiting on it. The request body is passed through verbatim as the signal payload. Returns 409 when the execution is not waiting on that signal.

<Heading
  id={"request"}
  as={"h2"}
  className={"openapi-tabs__heading"}
  children={"Request"}
>
</Heading>

<ParamsDetails
  parameters={[{"in":"path","name":"id","required":true,"schema":{"type":"string"},"description":"The execution id.","example":"exec_8f3a1b2c4d5e"},{"in":"path","name":"name","required":true,"schema":{"type":"string"},"description":"The signal name the execution is waiting on.","example":"approval:response"}]}
>
  
</ParamsDetails>

<RequestSchema
  title={"Body"}
  body={{"content":{"application/json":{"schema":{"type":"object","description":"Arbitrary JSON, delivered as the signal payload.","example":{"approved":true,"comment":"lgtm"}}}}}}
>
  
</RequestSchema>

<StatusCodes
  id={undefined}
  label={undefined}
  responses={{"200":{"description":"The signal was delivered.","content":{"application/json":{"schema":{"type":"object","properties":{"delivered":{"type":"boolean","enum":[true]},"signalId":{"type":"string","example":"sig_a1b2c3d4e5f60718"}}}}}},"4XX":{"description":"Client error. The body says what went wrong: an error `type`, a human-readable `detail`, and, on validation failures, one entry per offending field.","content":{"application/problem+json":{"schema":{"title":"Problem","type":"object","description":"The standard error body (RFC 7807 problem details, served as `application/problem+json`).","properties":{"type":{"type":"string","description":"Error type URI, e.g. `https://workflow-system.dev/errors/workflow-not-found`.","example":"https://workflow-system.dev/errors/workflow-not-found"},"title":{"type":"string","example":"Not found"},"status":{"type":"integer","example":404},"detail":{"type":"string","example":"No workflow with id wf_ifWBbWfpug0n exists"},"instance":{"type":"string","example":"/workflows/definitions/wf_ifWBbWfpug0n"},"errors":{"type":"array","description":"Present on validation failures: one entry per offending field.","items":{"type":"object","properties":{"path":{"type":"string","example":"/steps/scan/config"},"message":{"type":"string","example":"must have required property 'code'"}}}}}}}}},"5XX":{"description":"Unexpected server error.","content":{"application/problem+json":{"schema":{"title":"Problem","type":"object","description":"The standard error body (RFC 7807 problem details, served as `application/problem+json`).","properties":{"type":{"type":"string","description":"Error type URI, e.g. `https://workflow-system.dev/errors/workflow-not-found`.","example":"https://workflow-system.dev/errors/workflow-not-found"},"title":{"type":"string","example":"Not found"},"status":{"type":"integer","example":404},"detail":{"type":"string","example":"No workflow with id wf_ifWBbWfpug0n exists"},"instance":{"type":"string","example":"/workflows/definitions/wf_ifWBbWfpug0n"},"errors":{"type":"array","description":"Present on validation failures: one entry per offending field.","items":{"type":"object","properties":{"path":{"type":"string","example":"/steps/scan/config"},"message":{"type":"string","example":"must have required property 'code'"}}}}}}}}}}}
>
  
</StatusCodes>