> ## Documentation Index > Fetch the complete documentation index at: https://docs.erdo.ai/llms.txt > Use this file to discover all available pages before exploring further. # SendVoiceBrandedCallingLOAAPI mirrors erdo_voice_branded_calling_loa: it > emails the pre-filled letter to the signer (the business profile's representative unless one is named) to sign electronically, and returns the branded calling state with \`loa\_signature\`. Org admins only. ## OpenAPI ````yaml /api/openapi.json post /v1/voice/branded-calling/loa/send openapi: 3.0.0 info: title: Erdo API description: >- Erdo's REST API: query and write datasets, run agents, manage threads, integrations, pages, evals, workstreams, experiments, and bounded outreach. Authenticate with a Bearer API key (erdo_api_...) or scoped token (erdo_token_...). version: '2026-10-28' servers: - url: https://api.erdo.ai description: Production security: - bearerAuth: [] paths: /v1/voice/branded-calling/loa/send: post: summary: | SendVoiceBrandedCallingLOAAPI mirrors erdo_voice_branded_calling_loa: it description: > emails the pre-filled letter to the signer (the business profile's representative unless one is named) to sign electronically, and returns the branded calling state with \`loa\_signature\`. Org admins only. operationId: POST:mcp.SendVoiceBrandedCallingLOAAPI requestBody: content: application/json: schema: properties: letter_fingerprint: description: > state exactly the facts it identifies (BrandedCallingStatusResponse. LOALetterFingerprint) — so a letter approved some time ago is not emailed after the business profile changed. title: > LetterFingerprint, when set, refuses the send unless the letter would type: string signer_email: type: string signer_name: type: string type: object responses: '200': content: application/json: schema: properties: approved_at: format: date-time type: string default_display_name: type: string default_signer: $ref: '#/components/schemas/voice.BrandedCallingSigner' inputs: $ref: '#/components/schemas/voice.BrandedCallingInputs' inputs_digest: description: | exactly these. title: > InputsDigest identifies the inputs as they are now; an approval is for type: string last_polled_at: format: date-time type: string legal_name: description: > display name defaults to the legal name, trimmed to 35 characters. title: > LegalName and DefaultDisplayName come from the business profile: the type: string loa: $ref: '#/components/schemas/voice.BrandedCallingDocumentView' loa_letter_fingerprint: description: > (display name, legal name, contact, title, address). A send can pin it (SendBrandedCallingLOARequest.LetterFingerprint) so an approved letter is the letter emailed. Empty when the business profile could not be read. title: > LOALetterFingerprint identifies the facts a letter sent now would state type: string loa_signature: $ref: '#/components/schemas/voice.BrandedCallingLOASignatureView' logo_url: type: string missing_inputs: description: > MissingProfileFields what the business profile still needs. items: type: string title: > MissingInputs is what the organization still has to supply here; type: array missing_profile_fields: items: type: string type: array next_step: type: string not_registerable_reason: type: string numbers: items: $ref: '#/components/schemas/voice.BrandedCallingNumberView' title: | Numbers is every number the organization holds. type: array out_of_date: type: boolean price_per_call_usd: title: > PricePerCallUSD is what Twilio charges per call whose brand is delivered. type: string profile_unavailable: description: > The digest is then left empty, since it would not describe what a person approved, and filing is refused as retryable rather than as a change. title: > ProfileUnavailable says the business profile could not be read just now. type: boolean reason: description: | registration waits on. title: > Reason is Twilio's verdict, the last provider error, or what the type: string registerable: description: > with the reason (no number Erdo manages, a sole proprietor, outside the US). title: > Registerable is false when this organization can never file one here, type: boolean registered_call_reason: type: string registered_display_name: description: > carries; OutOfDate says the inputs changed since it was filed. title: > RegisteredDisplayName and RegisteredCallReason are what the registration type: string requested_at: format: date-time type: string review_status: type: string status: description: | approved, failed or not\_enabled. title: > Status is missing_inputs, unregistered (ready to request), pending, type: string use_case_categories: items: type: string type: array type: object description: Success response default: $ref: '#/components/responses/APIError' components: schemas: voice.BrandedCallingSigner: properties: email: type: string name: type: string title: | BrandedCallingSigner is a person the letter can be sent to. type: object voice.BrandedCallingInputs: properties: call_reason: title: > CallReason is the line under the name, e.g. "Your appointment request". type: string consent_description: title: | ConsentDescription says how the people called agreed to be called. type: string daily_call_volume: format: int64 type: integer display_name: title: | DisplayName is shown on the phone. Defaults to the legal name. type: string employee_count: format: int64 type: integer use_case_category: title: | UseCaseCategory is one of use_case_categories. type: string use_case_description: title: | UseCaseDescription says what the calls are for. type: string title: | BrandedCallingInputs are the text fields an organization supplies. type: object voice.BrandedCallingDocumentView: properties: filename: type: string source: description: | signing page (whose time is the signing time). title: | Source is upload, or signature for a letter signed through Erdo's type: string uploaded_at: format: date-time type: string title: | BrandedCallingDocumentView is an uploaded document, without its bytes. type: object voice.BrandedCallingLOASignatureView: description: | settings page and the tools show it. It never carries the link. properties: delivery_error: type: string delivery_status: description: | sent, failed (DeliveryError says why) or unknown (never confirmed). title: > DeliveryStatus is pending (the email's outcome is not confirmed yet), type: string expires_at: format: date-time type: string request_id: format: uuid title: | RequestID is the signing request: Erdo's own id, not a provider's. type: string sent_at: format: date-time type: string signed_at: format: date-time type: string signed_name: type: string signed_title: type: string signer_email_masked: type: string signer_name: type: string signing_url: description: > organization admin's read only, for them to copy and forward. Anyone holding it can sign until it expires. title: | SigningURL is the signing link while the request is open, on an type: string status: description: | letter's facts changed since it was sent, so it was not stored). title: > Status is sent, signed, expired, voided, or out_of_date (signed, but the type: string stored: title: | Stored is true once the signed letter is the organization's LOA. type: boolean voided_reason: type: string title: | BrandedCallingLOASignatureView is the letter sent for signature, as the type: object voice.BrandedCallingNumberView: properties: agent_name: type: string agent_ref: type: string agent_slug: type: string assign_error: type: string assignment: description: > in review), assigning (approved, this number not on it yet) or assigned. title: > Assignment is not_eligible, unregistered, pending (registration filed, type: string eligible: description: > the reason — most often that its SHAKEN/STIR attestation is not done yet. title: > Eligible is false while the number cannot be on the registration, with type: boolean not_eligible_reason: type: string phone_number: type: string title: | BrandedCallingNumberView is one number's part in the registration. type: object responses: APIError: content: application/json: schema: externalDocs: url: https://pkg.go.dev/encore.dev/beta/errs#Error properties: code: description: Error code example: not_found externalDocs: url: https://pkg.go.dev/encore.dev/beta/errs#ErrCode type: string details: description: Error details type: object message: description: Error message type: string title: APIError type: object description: Error response securitySchemes: bearerAuth: type: http scheme: bearer description: An Erdo API key (erdo_api_...) or scoped token (erdo_token_...). ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.