> ## Documentation Index > Fetch the complete documentation index at: https://heygen-1fa696a7.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Create Filler Word Removal > Submit a video and return a job id immediately. The job runs asynchronously: it transcribes the audio, detects filler words ('um', 'uh', ...), removes them along with overlong silences, and renders one cleaned video — no review step. If the run changes nothing at all, the job completes with the original video as output and the charge is automatically refunded. Pricing: $0.60 per source minute, 1-minute minimum. Poll GET /v3/filler-word-removals/{id} or subscribe to filler_word_removal.success / filler_word_removal.fail webhooks. ## OpenAPI ````yaml /openapi/external-api.json post /v3/filler-word-removals openapi: 3.1.0 info: title: HeyGen External API version: 1.0.0 description: >- HeyGen's external API for programmatic AI video creation. See https://docs.heygen.com for full documentation. contact: name: HeyGen Product Infra url: https://heygen.com servers: - url: https://api.heygen.com description: Production security: - ApiKeyAuth: [] - BearerAuth: [] tags: - name: Video Agent description: Create videos from text prompts using AI - name: Videos description: Create, list, retrieve, and delete videos - name: Templates description: Generate videos from reusable templates by replacing their variables - name: Voices description: Text-to-speech and voice management - name: Audio description: Search the background-music and sound-effects catalog - name: Video Translate description: Translate videos into other languages - name: AI Clipping description: Turn long-form videos into ready-to-share short clips with captions - name: Batches description: Create and track batches of videos. - name: Video Translation Batches description: Create and track batches of video translations. - name: Lipsync Batches description: Create and track batches of lipsyncs. - name: Asset Batches description: Create and track batches of direct-to-S3 asset uploads. - name: User description: Account information and billing - name: Avatars description: List and manage avatars and looks - name: Avatar Realtime description: >- Low-latency streaming avatar sessions — create a stream, poll for its HLS URL, push text, consume per-word timestamps - name: Assets description: Upload files for use in video creation - name: Webhooks description: Manage webhook endpoints and events - name: Lipsync description: Dub or replace audio on existing videos - name: Brand description: >- Brand-related resources — brand kits (colors, fonts, logos) and brand glossaries (custom term translations) - name: HyperFrames description: Render HyperFrames composition zips into video — separate from /v3/videos - name: Filler Word Removal description: '' paths: /v3/filler-word-removals: post: tags: - Filler Word Removal summary: Create Filler Word Removal description: >- Submit a video and return a job id immediately. The job runs asynchronously: it transcribes the audio, detects filler words ('um', 'uh', ...), removes them along with overlong silences, and renders one cleaned video — no review step. If the run changes nothing at all, the job completes with the original video as output and the charge is automatically refunded. Pricing: $0.60 per source minute, 1-minute minimum. Poll GET /v3/filler-word-removals/{id} or subscribe to filler_word_removal.success / filler_word_removal.fail webhooks. operationId: createFillerWordRemovalV3 parameters: - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateFillerWordRemovalRequest' responses: '202': description: Accepted — submission acknowledged; poll for completion. content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/CreateFillerWordRemovalResponse' '400': description: Invalid request parameters content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' examples: invalid_parameter: summary: Unusable source (zero duration / probe timeout) value: error: code: invalid_parameter message: >- The input video reports a zero duration — provide a valid video source. param: video doc_url: null video_too_long: summary: Source exceeds the 2-hour cap value: error: code: video_too_long message: >- The input video is 7305s long; the maximum supported duration is 7200s (2 hours). param: video doc_url: null no_audio_track: summary: Source has no audio stream value: error: code: no_audio_track message: >- The input video has no audio track. Filler removal needs speech audio to transcribe. param: video doc_url: null download_failed: summary: Source URL unreachable or unreadable value: error: code: download_failed message: >- Could not read the input video — provide a valid, accessible video URL or asset_id. param: video doc_url: null '401': description: Authentication failed content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: authentication_failed message: Invalid or expired API key. Verify your x-api-key header. param: null doc_url: null '402': description: Insufficient credit content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: insufficient_credit message: Not enough premium credits for Speech Cleanup param: null doc_url: null '409': $ref: '#/components/responses/IdempotencyInProgress' '429': description: Rate limit exceeded content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: rate_limit_exceeded message: >- Too many requests. Retry after the duration specified in the Retry-After header. param: null doc_url: null headers: Retry-After: description: Seconds to wait before retrying schema: type: integer security: - ApiKeyAuth: [] - BearerAuth: [] components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false description: >- Optional client-supplied key for safely retrying mutations. Subsequent calls within 24 hours that share this key replay the original response — even if the request body differs slightly (a warning is logged). A retry that arrives while the original is still in flight gets a 409 `request_in_progress`. Keys must be 1–255 characters from `[A-Za-z0-9_:.-]`; a UUID is a safe default. Scope is per-endpoint and per-resource: the same key on a different route or path parameter is independent. schema: type: string pattern: ^[A-Za-z0-9_\-:.]{1,255}$ maxLength: 255 minLength: 1 example: 550e8400-e29b-41d4-a716-446655440000 schemas: CreateFillerWordRemovalRequest: additionalProperties: false description: Request body for POST /v3/filler-word-removals. properties: video: description: >- Source video to clean. Either a URL or an asset_id from POST /v1/asset. discriminator: mapping: asset_id: $ref: '#/components/schemas/AssetId' url: $ref: '#/components/schemas/AssetUrl' propertyName: type oneOf: - $ref: '#/components/schemas/AssetUrl' - $ref: '#/components/schemas/AssetId' title: Video title: anyOf: - maxLength: 255 type: string - type: 'null' default: null description: Display title for the job. Defaults to 'Filler Removal' if omitted. title: Title callback_url: anyOf: - type: string - type: 'null' default: null description: >- HTTPS URL to receive per-job webhook callbacks (filler_word_removal.success / filler_word_removal.fail). Delivery is best-effort with limited retries — poll GET /v3/filler-word-removals/{id} as the source of truth (a terminal GET may precede its webhook). Per-job callback_url deliveries are NOT HMAC-signed: authenticate them by verifying TLS and matching the echoed callback_id, and do not trust an unverified body. To receive a signed payload, register a webhook endpoint with a secret via /v3/webhooks/endpoints. title: Callback Url callback_id: anyOf: - maxLength: 128 type: string - type: 'null' default: null description: Opaque client identifier echoed verbatim in webhook payloads. title: Callback Id required: - video title: CreateFillerWordRemovalRequest type: object CreateFillerWordRemovalResponse: description: >- Response for POST /v3/filler-word-removals. Mirrors the v3 single-ID create shape. properties: filler_word_removal_id: description: Unique job identifier. Use with GET /v3/filler-word-removals/{id}. title: Filler Word Removal Id type: string required: - filler_word_removal_id title: CreateFillerWordRemovalResponse type: object StandardAPIError: type: object properties: code: type: string description: Machine-readable error code example: invalid_parameter message: type: string description: Human-readable error message example: Video not found param: type: - string - 'null' description: Which request field caused the error doc_url: type: - string - 'null' description: Link to error documentation required: - code - message AssetId: additionalProperties: false description: Asset input via HeyGen asset ID from the asset upload endpoint. properties: type: const: asset_id description: Input type discriminator title: Type type: string asset_id: description: HeyGen asset ID from the asset upload endpoint title: Asset Id type: string required: - type - asset_id title: AssetId type: object AssetUrl: additionalProperties: false description: Asset input via publicly accessible HTTPS URL. properties: type: const: url description: Input type discriminator title: Type type: string url: description: Publicly accessible HTTPS URL for the asset title: Url type: string required: - type - url title: AssetUrl type: object responses: IdempotencyInProgress: description: >- A prior request with this Idempotency-Key is still in progress. Wait for the original request to complete, then retry. content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: request_in_progress message: >- A request with this Idempotency-Key is already in progress. Retry shortly. param: null doc_url: null securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: HeyGen API key. Obtain from your HeyGen dashboard. BearerAuth: type: http scheme: bearer description: OAuth2 bearer token. ````