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POSTSign Up POSTAttach Human POSTVerify GETList Inboxes POSTCreate Inbox GETSearch Inboxes GETGet Inbox PATCHUpdate Inbox DELDelete Inbox POSTAuthorize Inbox GETList Threads GETSearch Threads GETGet Thread PATCHUpdate Thread DELDelete Thread GETGet Attachment GETList Messages GETSearch Messages GETGet Message PATCHUpdate Message DELDelete Message POSTBatch Get Messages POSTBatch Update Messages GETGet Attachment GETGet Raw Message POSTSend Message POSTReply To Message POSTReply All Message POSTForward Message GETList Drafts POSTCreate Draft GETGet Draft PATCHUpdate Draft DELDelete Draft GETGet Attachment POSTSend Draft GETList Webhooks POSTCreate Webhook GETGet Webhook PATCHUpdate Webhook DELDelete Webhook GETGet Webhook Headers PATCHUpdate Webhook Headers GETList Entries POSTCreate List Entry GETGet List Entry DELDelete List Entry GETQuery Events GETQuery Usage GETQuery Rates GETList Inbox Events GETList API Keys POSTCreate API Key PATCHUpdate API Key DELDelete API Key GETList Accounts GETGet Account GETList Threads GETSearch Threads GETGet Thread PATCHUpdate Thread DELDelete Thread GETGet Attachment GETList Drafts GETGet Draft GETGet Attachment GETList Webhooks POSTCreate Webhook GETGet Webhook PATCHUpdate Webhook DELDelete Webhook GETGet Webhook Headers PATCHUpdate Webhook Headers GETList Domains POSTCreate Domain GETGet Domain PATCHUpdate Domain DELDelete Domain GETGet Zone File POSTVerify Domain GETGet Setup Link GETList Entries POSTCreate List Entry GETGet List Entry DELDelete List Entry GETQuery Events GETQuery Usage GETQuery Rates GETList API Keys POSTCreate API Key GETGet API Key PATCHUpdate API Key DELDelete API Key GETList Providers GETSearch Providers GETGet Provider GETList Provider Accounts POSTConnect Provider GETList Accounts GETGet Account PATCHUpdate Account GETList Pods POSTCreate Pod GETGet Pod DELDelete Pod GETList Inboxes POSTCreate Inbox GETSearch Inboxes GETGet Inbox PATCHUpdate Inbox DELDelete Inbox GETList Threads GETSearch Threads GETGet Thread PATCHUpdate Thread DELDelete Thread GETGet Attachment GETList Drafts GETGet Draft GETGet Attachment GETList Webhooks POSTCreate Webhook GETGet Webhook PATCHUpdate Webhook DELDelete Webhook GETGet Webhook Headers PATCHUpdate Webhook Headers GETList Domains POSTCreate Domain GETGet Domain PATCHUpdate Domain DELDelete Domain GETGet Zone File POSTVerify Domain GETList Entries POSTCreate List Entry GETGet List Entry DELDelete List Entry GETQuery Events GETQuery Usage GETQuery Rates GETList API Keys POSTCreate API Key PATCHUpdate API Key DELDelete API Key GETList Accounts GETGet Account GETGet Organization GETWho Am I POSTMessage Received POSTMessage Sent POSTMessage Delivered POSTMessage Bounced POSTMessage Complained POSTMessage Rejected POSTMessage Opened POSTDomain Verified

Update Webhook Headers

PATCH/v0/webhooks/{webhook_id}/headers

Atomically set, replace, or remove custom HTTP headers included with deliveries to this webhook. Header values remain write-only.

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