Telnyx · Authentication Profile

Telnyx Authentication

Authentication

Telnyx secures its APIs with http and oauth2 across 3 declared security schemes, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the authorizationCode and clientCredentials flow(s).

CommunicationsCPaaSVoiceSMSIoTTelecommunicationsMessagingArtificial IntelligenceMCPVoice AIPhone NumbersInference
Methods: http, oauth2 Schemes: 3 OAuth flows: authorizationCode, clientCredentials API key in:

Security Schemes

bearerAuth http
scheme: bearer
oauthClientAuth oauth2
· flows: authorizationCode, clientCredentials
Payment x402

Source

Authentication Profile

Raw ↑ 
generated: '2026-10-08'
method: searched
source: openapi/ securitySchemes + https://developers.telnyx.com/docs/development/api-fundamentals/authentication
  + https://telnyx.com/auth.md + https://api.telnyx.com/.well-known/oauth-authorization-server (2026-10-08)
summary:
  types:
  - http
  - oauth2
  oauth2_flows:
  - authorizationCode
  - clientCredentials
schemes:
- name: bearerAuth
  type: http
  scheme: bearer
  sources:
  - openapi/telnyx-access-tokens-api-openapi.yml
  - openapi/telnyx-addresses-api-openapi.yml
  - openapi/telnyx-advanced-number-orders-api-openapi.yml
  - openapi/telnyx-assistants-api-openapi.yml
  - openapi/telnyx-audio-api-openapi.yml
  - openapi/telnyx-audit-logs-api-openapi.yml
  - openapi/telnyx-authentication-providers-api-openapi.yml
  - openapi/telnyx-autorechargepreferences-api-openapi.yml
  - openapi/telnyx-billing-api-openapi.yml
  - openapi/telnyx-billing-groups-api-openapi.yml
  - openapi/telnyx-brands-api-openapi.yml
  - openapi/telnyx-bucket-ssl-certificate-api-openapi.yml
  - openapi/telnyx-bucket-usage-api-openapi.yml
  - openapi/telnyx-bulk-phone-number-campaigns-api-openapi.yml
  - openapi/telnyx-bulk-phone-number-operations-api-openapi.yml
  - openapi/telnyx-bundles-api-openapi.yml
  - openapi/telnyx-call-commands-api-openapi.yml
  - openapi/telnyx-call-control-applications-api-openapi.yml
  - openapi/telnyx-call-information-api-openapi.yml
  - openapi/telnyx-call-recordings-api-openapi.yml
  - openapi/telnyx-callbacks-api-openapi.yml
  - openapi/telnyx-campaign-api-openapi.yml
  - openapi/telnyx-cdr-reports-api-openapi.yml
  - openapi/telnyx-cdr-usage-reports-api-openapi.yml
  - openapi/telnyx-charges-breakdown-api-openapi.yml
  - openapi/telnyx-charges-summary-api-openapi.yml
  - openapi/telnyx-chat-api-openapi.yml
  - openapi/telnyx-clusters-api-openapi.yml
  - openapi/telnyx-conference-commands-api-openapi.yml
  - openapi/telnyx-connections-api-openapi.yml
  - openapi/telnyx-conversations-api-openapi.yml
  - openapi/telnyx-country-coverage-api-openapi.yml
  - openapi/telnyx-coverage-api-openapi.yml
  - openapi/telnyx-credential-connections-api-openapi.yml
  - openapi/telnyx-credentials-api-openapi.yml
  - openapi/telnyx-csv-downloads-api-openapi.yml
  - openapi/telnyx-customer-service-record-api-openapi.yml
  - openapi/telnyx-data-migration-api-openapi.yml
  - openapi/telnyx-debugging-api-openapi.yml
  - openapi/telnyx-detail-records-api-openapi.yml
  - openapi/telnyx-dialogflow-integration-api-openapi.yml
  - openapi/telnyx-documents-api-openapi.yml
  - openapi/telnyx-dynamic-emergency-addresses-api-openapi.yml
  - openapi/telnyx-dynamic-emergency-endpoints-api-openapi.yml
  - openapi/telnyx-embeddings-api-openapi.yml
  - openapi/telnyx-enterprises-api-openapi.yml
  - openapi/telnyx-enum-api-openapi.yml
  - openapi/telnyx-external-connections-api-openapi.yml
  - openapi/telnyx-fine-tuning-api-openapi.yml
  - openapi/telnyx-fqdn-connections-api-openapi.yml
  - openapi/telnyx-fqdns-api-openapi.yml
  - openapi/telnyx-global-ips-api-openapi.yml
  - openapi/telnyx-hosted-numbers-api-openapi.yml
  - openapi/telnyx-inexplicit-number-orders-api-openapi.yml
  - openapi/telnyx-integration-secrets-api-openapi.yml
  - openapi/telnyx-integrations-api-openapi.yml
  - openapi/telnyx-inventory-level-api-openapi.yml
  - openapi/telnyx-invoices-api-openapi.yml
  - openapi/telnyx-ip-addresses-api-openapi.yml
  - openapi/telnyx-ip-connections-api-openapi.yml
  - openapi/telnyx-ip-ranges-api-openapi.yml
  - openapi/telnyx-ips-api-openapi.yml
  - openapi/telnyx-managed-accounts-api-openapi.yml
  - openapi/telnyx-mcp-servers-api-openapi.yml
  - openapi/telnyx-mdr-detail-reports-api-openapi.yml
  - openapi/telnyx-mdr-detailed-reports-api-openapi.yml
  - openapi/telnyx-mdr-usage-reports-api-openapi.yml
  - openapi/telnyx-media-storage-api-api-openapi.yml
  - openapi/telnyx-messages-api-openapi.yml
  - openapi/telnyx-messaging-api-openapi.yml
  - openapi/telnyx-messaging-url-domains-api-openapi.yml
  - openapi/telnyx-missions-api-openapi.yml
  - openapi/telnyx-mobile-network-operators-api-openapi.yml
  - openapi/telnyx-mobile-number-settings-api-openapi.yml
  - openapi/telnyx-mobile-phone-numbers-api-openapi.yml
  - openapi/telnyx-mobile-voice-connections-api-openapi.yml
  - openapi/telnyx-networks-api-openapi.yml
  - openapi/telnyx-notifications-api-openapi.yml
  - openapi/telnyx-number-lookup-api-openapi.yml
  - openapi/telnyx-number-portout-api-openapi.yml
  - openapi/telnyx-number-reputation-settings-api-openapi.yml
  - openapi/telnyx-number-settings-api-openapi.yml
  - openapi/telnyx-numbers-features-api-openapi.yml
  - openapi/telnyx-oauth-clients-api-openapi.yml
  - openapi/telnyx-oauth-discovery-api-openapi.yml
  - openapi/telnyx-oauth-grants-api-openapi.yml
  - openapi/telnyx-oauth-protocol-api-openapi.yml
  - openapi/telnyx-openai-chat-api-openapi.yml
  - openapi/telnyx-openai-embeddings-api-openapi.yml
  - openapi/telnyx-opt-out-management-api-openapi.yml
  - openapi/telnyx-organization-users-api-openapi.yml
  - openapi/telnyx-ota-updates-api-openapi.yml
  - openapi/telnyx-outbound-voice-profiles-api-openapi.yml
  - openapi/telnyx-phone-number-block-orders-api-openapi.yml
  - openapi/telnyx-phone-number-blocks-background-jobs-api-openapi.yml
  - openapi/telnyx-phone-number-campaigns-api-openapi.yml
  - openapi/telnyx-phone-number-configurations-api-openapi.yml
  - openapi/telnyx-phone-number-orders-api-openapi.yml
  - openapi/telnyx-phone-number-porting-api-openapi.yml
  - openapi/telnyx-phone-number-reservations-api-openapi.yml
  - openapi/telnyx-phone-number-search-api-openapi.yml
  - openapi/telnyx-porting-orders-api-openapi.yml
  - openapi/telnyx-presigned-object-urls-api-openapi.yml
  - openapi/telnyx-private-wireless-gateways-api-openapi.yml
  - openapi/telnyx-profiles-api-openapi.yml
  - openapi/telnyx-programmable-fax-applications-api-openapi.yml
  - openapi/telnyx-programmable-fax-commands-api-openapi.yml
  - openapi/telnyx-pronunciation-dictionaries-api-openapi.yml
  - openapi/telnyx-public-internet-gateways-api-openapi.yml
  - openapi/telnyx-push-credentials-api-openapi.yml
  - openapi/telnyx-queue-commands-api-openapi.yml
  - openapi/telnyx-rcs-api-openapi.yml
  - openapi/telnyx-regions-api-openapi.yml
  - openapi/telnyx-regulatory-requirements-api-openapi.yml
  - openapi/telnyx-reporting-api-openapi.yml
  - openapi/telnyx-reports-api-openapi.yml
  - openapi/telnyx-reputation-phone-numbers-api-openapi.yml
  - openapi/telnyx-requirement-groups-api-openapi.yml
  - openapi/telnyx-requirement-types-api-openapi.yml
  - openapi/telnyx-requirements-api-openapi.yml
  - openapi/telnyx-room-compositions-api-openapi.yml
  - openapi/telnyx-room-participants-api-openapi.yml
  - openapi/telnyx-room-recordings-api-openapi.yml
  - openapi/telnyx-room-sessions-api-openapi.yml
  - openapi/telnyx-rooms-api-openapi.yml
  - openapi/telnyx-rooms-client-tokens-api-openapi.yml
  - openapi/telnyx-session-analysis-api-openapi.yml
  - openapi/telnyx-seti-observability-api-openapi.yml
  - openapi/telnyx-shared-campaigns-api-openapi.yml
  - openapi/telnyx-short-codes-api-openapi.yml
  - openapi/telnyx-sim-card-actions-api-openapi.yml
  - openapi/telnyx-sim-card-group-actions-api-openapi.yml
  - openapi/telnyx-sim-card-groups-api-openapi.yml
  - openapi/telnyx-sim-card-orders-api-openapi.yml
  - openapi/telnyx-sim-cards-api-openapi.yml
  - openapi/telnyx-siprec-connectors-api-openapi.yml
  - openapi/telnyx-speech-to-text-batch-reports-api-openapi.yml
  - openapi/telnyx-speech-to-text-over-websockets-api-openapi.yml
  - openapi/telnyx-speech-to-text-usage-reports-api-openapi.yml
  - openapi/telnyx-stored-payment-transactions-api-openapi.yml
  - openapi/telnyx-telco-data-usage-reports-api-openapi.yml
  - openapi/telnyx-terms-of-service-api-openapi.yml
  - openapi/telnyx-texml-applications-api-openapi.yml
  - openapi/telnyx-texml-rest-commands-api-openapi.yml
  - openapi/telnyx-text-to-speech-commands-api-openapi.yml
  - openapi/telnyx-traffic-policy-profiles-api-openapi.yml
  - openapi/telnyx-uac-connections-api-openapi.yml
  - openapi/telnyx-usage-reports-beta-api-openapi.yml
  - openapi/telnyx-user-bundles-api-openapi.yml
  - openapi/telnyx-user-tags-api-openapi.yml
  - openapi/telnyx-useraddresses-api-openapi.yml
  - openapi/telnyx-verification-requests-api-openapi.yml
  - openapi/telnyx-verified-numbers-api-openapi.yml
  - openapi/telnyx-verify-api-openapi.yml
  - openapi/telnyx-virtual-cross-connects-api-openapi.yml
  - openapi/telnyx-voice-channels-api-openapi.yml
  - openapi/telnyx-voice-clones-api-openapi.yml
  - openapi/telnyx-voice-designs-api-openapi.yml
  - openapi/telnyx-voicemail-api-openapi.yml
  - openapi/telnyx-wdr-detail-reports-api-openapi.yml
  - openapi/telnyx-webhooks-api-openapi.yml
  - openapi/telnyx-whatsapp-business-accounts-api-openapi.yml
  - openapi/telnyx-whatsapp-message-templates-api-openapi.yml
  - openapi/telnyx-whatsapp-messaging-api-openapi.yml
  - openapi/telnyx-whatsapp-phone-numbers-api-openapi.yml
  - openapi/telnyx-wireguard-interfaces-api-openapi.yml
  - openapi/telnyx-wireless-blocklists-api-openapi.yml
  - openapi/telnyx-wireless-regions-api-openapi.yml
  - openapi/telnyx-x402-payment-transactions-api-openapi.yml
- name: oauthClientAuth
  type: oauth2
  flows:
  - flow: authorizationCode
    authorizationUrl: https://api.telnyx.com/v2/oauth/authorize
    tokenUrl: https://api.telnyx.com/v2/oauth/token
    scopes: 1
  - flow: clientCredentials
    tokenUrl: https://api.telnyx.com/v2/oauth/token
    scopes: 1
  description: OAuth 2.0 authentication for Telnyx API and MCP integrations
  sources:
  - openapi/telnyx-access-tokens-api-openapi.yml
  - openapi/telnyx-addresses-api-openapi.yml
  - openapi/telnyx-advanced-number-orders-api-openapi.yml
  - openapi/telnyx-assistants-api-openapi.yml
  - openapi/telnyx-audio-api-openapi.yml
  - openapi/telnyx-audit-logs-api-openapi.yml
  - openapi/telnyx-authentication-providers-api-openapi.yml
  - openapi/telnyx-autorechargepreferences-api-openapi.yml
  - openapi/telnyx-billing-api-openapi.yml
  - openapi/telnyx-billing-groups-api-openapi.yml
  - openapi/telnyx-brands-api-openapi.yml
  - openapi/telnyx-bucket-ssl-certificate-api-openapi.yml
  - openapi/telnyx-bucket-usage-api-openapi.yml
  - openapi/telnyx-bulk-phone-number-campaigns-api-openapi.yml
  - openapi/telnyx-bulk-phone-number-operations-api-openapi.yml
  - openapi/telnyx-bundles-api-openapi.yml
  - openapi/telnyx-call-commands-api-openapi.yml
  - openapi/telnyx-call-control-applications-api-openapi.yml
  - openapi/telnyx-call-information-api-openapi.yml
  - openapi/telnyx-call-recordings-api-openapi.yml
  - openapi/telnyx-callbacks-api-openapi.yml
  - openapi/telnyx-campaign-api-openapi.yml
  - openapi/telnyx-cdr-reports-api-openapi.yml
  - openapi/telnyx-cdr-usage-reports-api-openapi.yml
  - openapi/telnyx-charges-breakdown-api-openapi.yml
  - openapi/telnyx-charges-summary-api-openapi.yml
  - openapi/telnyx-chat-api-openapi.yml
  - openapi/telnyx-clusters-api-openapi.yml
  - openapi/telnyx-conference-commands-api-openapi.yml
  - openapi/telnyx-connections-api-openapi.yml
  - openapi/telnyx-conversations-api-openapi.yml
  - openapi/telnyx-country-coverage-api-openapi.yml
  - openapi/telnyx-coverage-api-openapi.yml
  - openapi/telnyx-credential-connections-api-openapi.yml
  - openapi/telnyx-credentials-api-openapi.yml
  - openapi/telnyx-csv-downloads-api-openapi.yml
  - openapi/telnyx-customer-service-record-api-openapi.yml
  - openapi/telnyx-data-migration-api-openapi.yml
  - openapi/telnyx-debugging-api-openapi.yml
  - openapi/telnyx-detail-records-api-openapi.yml
  - openapi/telnyx-dialogflow-integration-api-openapi.yml
  - openapi/telnyx-documents-api-openapi.yml
  - openapi/telnyx-dynamic-emergency-addresses-api-openapi.yml
  - openapi/telnyx-dynamic-emergency-endpoints-api-openapi.yml
  - openapi/telnyx-embeddings-api-openapi.yml
  - openapi/telnyx-enterprises-api-openapi.yml
  - openapi/telnyx-enum-api-openapi.yml
  - openapi/telnyx-external-connections-api-openapi.yml
  - openapi/telnyx-fine-tuning-api-openapi.yml
  - openapi/telnyx-fqdn-connections-api-openapi.yml
  - openapi/telnyx-fqdns-api-openapi.yml
  - openapi/telnyx-global-ips-api-openapi.yml
  - openapi/telnyx-hosted-numbers-api-openapi.yml
  - openapi/telnyx-inexplicit-number-orders-api-openapi.yml
  - openapi/telnyx-integration-secrets-api-openapi.yml
  - openapi/telnyx-integrations-api-openapi.yml
  - openapi/telnyx-inventory-level-api-openapi.yml
  - openapi/telnyx-invoices-api-openapi.yml
  - openapi/telnyx-ip-addresses-api-openapi.yml
  - openapi/telnyx-ip-connections-api-openapi.yml
  - openapi/telnyx-ip-ranges-api-openapi.yml
  - openapi/telnyx-ips-api-openapi.yml
  - openapi/telnyx-managed-accounts-api-openapi.yml
  - openapi/telnyx-mcp-servers-api-openapi.yml
  - openapi/telnyx-mdr-detail-reports-api-openapi.yml
  - openapi/telnyx-mdr-detailed-reports-api-openapi.yml
  - openapi/telnyx-mdr-usage-reports-api-openapi.yml
  - openapi/telnyx-media-storage-api-api-openapi.yml
  - openapi/telnyx-messages-api-openapi.yml
  - openapi/telnyx-messaging-api-openapi.yml
  - openapi/telnyx-messaging-url-domains-api-openapi.yml
  - openapi/telnyx-missions-api-openapi.yml
  - openapi/telnyx-mobile-network-operators-api-openapi.yml
  - openapi/telnyx-mobile-number-settings-api-openapi.yml
  - openapi/telnyx-mobile-phone-numbers-api-openapi.yml
  - openapi/telnyx-mobile-voice-connections-api-openapi.yml
  - openapi/telnyx-networks-api-openapi.yml
  - openapi/telnyx-notifications-api-openapi.yml
  - openapi/telnyx-number-lookup-api-openapi.yml
  - openapi/telnyx-number-portout-api-openapi.yml
  - openapi/telnyx-number-reputation-settings-api-openapi.yml
  - openapi/telnyx-number-settings-api-openapi.yml
  - openapi/telnyx-numbers-features-api-openapi.yml
  - openapi/telnyx-oauth-clients-api-openapi.yml
  - openapi/telnyx-oauth-discovery-api-openapi.yml
  - openapi/telnyx-oauth-grants-api-openapi.yml
  - openapi/telnyx-oauth-protocol-api-openapi.yml
  - openapi/telnyx-openai-chat-api-openapi.yml
  - openapi/telnyx-openai-embeddings-api-openapi.yml
  - openapi/telnyx-opt-out-management-api-openapi.yml
  - openapi/telnyx-organization-users-api-openapi.yml
  - openapi/telnyx-ota-updates-api-openapi.yml
  - openapi/telnyx-outbound-voice-profiles-api-openapi.yml
  - openapi/telnyx-phone-number-block-orders-api-openapi.yml
  - openapi/telnyx-phone-number-blocks-background-jobs-api-openapi.yml
  - openapi/telnyx-phone-number-campaigns-api-openapi.yml
  - openapi/telnyx-phone-number-configurations-api-openapi.yml
  - openapi/telnyx-phone-number-orders-api-openapi.yml
  - openapi/telnyx-phone-number-porting-api-openapi.yml
  - openapi/telnyx-phone-number-reservations-api-openapi.yml
  - openapi/telnyx-phone-number-search-api-openapi.yml
  - openapi/telnyx-porting-orders-api-openapi.yml
  - openapi/telnyx-presigned-object-urls-api-openapi.yml
  - openapi/telnyx-private-wireless-gateways-api-openapi.yml
  - openapi/telnyx-profiles-api-openapi.yml
  - openapi/telnyx-programmable-fax-applications-api-openapi.yml
  - openapi/telnyx-programmable-fax-commands-api-openapi.yml
  - openapi/telnyx-pronunciation-dictionaries-api-openapi.yml
  - openapi/telnyx-public-internet-gateways-api-openapi.yml
  - openapi/telnyx-push-credentials-api-openapi.yml
  - openapi/telnyx-queue-commands-api-openapi.yml
  - openapi/telnyx-rcs-api-openapi.yml
  - openapi/telnyx-regions-api-openapi.yml
  - openapi/telnyx-regulatory-requirements-api-openapi.yml
  - openapi/telnyx-reporting-api-openapi.yml
  - openapi/telnyx-reports-api-openapi.yml
  - openapi/telnyx-reputation-phone-numbers-api-openapi.yml
  - openapi/telnyx-requirement-groups-api-openapi.yml
  - openapi/telnyx-requirement-types-api-openapi.yml
  - openapi/telnyx-requirements-api-openapi.yml
  - openapi/telnyx-room-compositions-api-openapi.yml
  - openapi/telnyx-room-participants-api-openapi.yml
  - openapi/telnyx-room-recordings-api-openapi.yml
  - openapi/telnyx-room-sessions-api-openapi.yml
  - openapi/telnyx-rooms-api-openapi.yml
  - openapi/telnyx-rooms-client-tokens-api-openapi.yml
  - openapi/telnyx-session-analysis-api-openapi.yml
  - openapi/telnyx-seti-observability-api-openapi.yml
  - openapi/telnyx-shared-campaigns-api-openapi.yml
  - openapi/telnyx-short-codes-api-openapi.yml
  - openapi/telnyx-sim-card-actions-api-openapi.yml
  - openapi/telnyx-sim-card-group-actions-api-openapi.yml
  - openapi/telnyx-sim-card-groups-api-openapi.yml
  - openapi/telnyx-sim-card-orders-api-openapi.yml
  - openapi/telnyx-sim-cards-api-openapi.yml
  - openapi/telnyx-siprec-connectors-api-openapi.yml
  - openapi/telnyx-speech-to-text-batch-reports-api-openapi.yml
  - openapi/telnyx-speech-to-text-over-websockets-api-openapi.yml
  - openapi/telnyx-speech-to-text-usage-reports-api-openapi.yml
  - openapi/telnyx-stored-payment-transactions-api-openapi.yml
  - openapi/telnyx-telco-data-usage-reports-api-openapi.yml
  - openapi/telnyx-terms-of-service-api-openapi.yml
  - openapi/telnyx-texml-applications-api-openapi.yml
  - openapi/telnyx-texml-rest-commands-api-openapi.yml
  - openapi/telnyx-text-to-speech-commands-api-openapi.yml
  - openapi/telnyx-traffic-policy-profiles-api-openapi.yml
  - openapi/telnyx-uac-connections-api-openapi.yml
  - openapi/telnyx-usage-reports-beta-api-openapi.yml
  - openapi/telnyx-user-bundles-api-openapi.yml
  - openapi/telnyx-user-tags-api-openapi.yml
  - openapi/telnyx-useraddresses-api-openapi.yml
  - openapi/telnyx-verification-requests-api-openapi.yml
  - openapi/telnyx-verified-numbers-api-openapi.yml
  - openapi/telnyx-verify-api-openapi.yml
  - openapi/telnyx-virtual-cross-connects-api-openapi.yml
  - openapi/telnyx-voice-channels-api-openapi.yml
  - openapi/telnyx-voice-clones-api-openapi.yml
  - openapi/telnyx-voice-designs-api-openapi.yml
  - openapi/telnyx-voicemail-api-openapi.yml
  - openapi/telnyx-wdr-detail-reports-api-openapi.yml
  - openapi/telnyx-webhooks-api-openapi.yml
  - openapi/telnyx-whatsapp-business-accounts-api-openapi.yml
  - openapi/telnyx-whatsapp-message-templates-api-openapi.yml
  - openapi/telnyx-whatsapp-messaging-api-openapi.yml
  - openapi/telnyx-whatsapp-phone-numbers-api-openapi.yml
  - openapi/telnyx-wireguard-interfaces-api-openapi.yml
  - openapi/telnyx-wireless-blocklists-api-openapi.yml
  - openapi/telnyx-wireless-regions-api-openapi.yml
  - openapi/telnyx-x402-payment-transactions-api-openapi.yml
- name: Payment
  type: x402
  description: 'Pay-per-call inference without an account: POST https://x402.telnyx.com/v1/chat/completions returns
    402 with a payment quote; retry with the signed EIP-3009 USDC quote in the X-Payment header (auth.md Method
    3; `Payment` securityScheme in https://telnyx.com/openapi.json).'
  sources:
  - https://telnyx.com/auth.md
  - https://telnyx.com/.well-known/x402
docs: https://developers.telnyx.com/docs/development/api-fundamentals/authentication
details:
  api_key:
    header: 'Authorization: Bearer <TELNYX_API_KEY>'
    issued_at: https://portal.telnyx.com/#/app/api-keys
    note: Keys may carry an expiration date; the docs list a seven-step rotation lifecycle.
    agent_signup: https://telnyx.com/agent-signup.md (programmatic bot-challenge signup named in auth.md; not exercised)
  oauth2:
    authorization_server: https://api.telnyx.com/.well-known/oauth-authorization-server
    grants_supported:
    - authorization_code
    - client_credentials
    - refresh_token
    credential_types_supported:
    - bearer_api_key
    - oauth_pkce
    pkce: S256 (auth.md Method 2)
    scopes: scopes/telnyx-scopes.yml
  unauthenticated_response: '401 with WWW-Authenticate: Bearer realm="Telnyx API", error="invalid_token" (auth.md)'
  webhooks:
    signature_headers:
    - telnyx-timestamp
    - telnyx-signature-ed25519
    public_key: https://portal.telnyx.com/#/api-keys/public-key

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