> ## Documentation Index > Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt > Use this file to discover all available pages before exploring further. # Delete a key > Revokes a key and returns it as it was, without its value. The instance must be `ready`; otherwise the request answers `409`. ## OpenAPI ````yaml /openapi/source/external/agent-gateway/agent-gateway.json delete /agent_gateways/{instance_id}/keys/{key_id} openapi: 3.1.0 info: version: 1.0.0 title: Telnyx API x-latency-category: interactive x-endpoint-cost: light description: >- Agent Gateway authenticates, authorizes, and audits the requests agents send to models, tools, and other agents. Each gateway runs as a dedicated instance on the account's [*Network*](https://developers.telnyx.com/docs/network/overview). This API creates, lists, and deletes instances, and manages the keys, teams, spend logs, MCP servers, APIs, tool permissions, and guardrails on them. Each instance serves an OpenAI-compatible API at its `gateway_url`. servers: - url: https://api.telnyx.com/v2 description: Telnyx API v2 security: - bearerAuth: [] tags: - name: Agent Gateways description: Create, list, retrieve, and delete Agent Gateway instances. - name: Agent Gateway Keys description: Keys on an instance. - name: Agent Gateway Teams description: 'Teams on an instance: shared model lists, budgets, and rate limits.' - name: Agent Gateway Spend Logs description: The requests an instance served, with their cost. - name: Agent Gateway MCP Servers description: MCP servers on an instance, served to agents at one MCP endpoint. - name: Agent Gateway APIs description: REST APIs on an instance, served to agents as tools. - name: Agent Gateway Tool Permissions description: The MCP servers and tools a key or team may use. - name: Agent Gateway Guardrails description: Checks an instance runs on model and tool requests. - name: Agent Gateway Policies description: Named sets of guardrails an instance applies to requests. - name: Agent Gateway Policy Attachments description: Where an instance applies each policy. paths: /agent_gateways/{instance_id}/keys/{key_id}: delete: tags: - Agent Gateway Keys summary: Delete a key description: >- Revokes a key and returns it as it was, without its value. The instance must be `ready`; otherwise the request answers `409`. operationId: DeleteAgentGatewayKey parameters: - name: instance_id in: path required: true description: The Agent Gateway's `id`. schema: type: string format: uuid example: ecffdf4b-93ea-4a7b-8295-51dfd2077996 - name: key_id in: path required: true description: >- The key's `id`, a 64-character hash the instance stores in place of the key. schema: type: string pattern: ^[0-9a-f]{64}$ example: 5f1c3a0e9b7d4c2a8e6f0b1d3c5a7e9f2b4d6c8a0e1f3a5c7e9b1d3f5a7c9e0b responses: '200': description: The revoked key content: application/json: schema: $ref: '#/components/schemas/AgentGatewayKeyResponse' example: data: id: >- 5f1c3a0e9b7d4c2a8e6f0b1d3c5a7e9f2b4d6c8a0e1f3a5c7e9b1d3f5a7c9e0b name: support-agent team_id: 0b6c5d4e-3f2a-4b1c-9d8e-7f6a5b4c3d2e models: - GLM-5.3-Flash max_budget: 20 budget_resets_every: 30d budget_resets_at: '2026-11-20T19:40:00Z' spend: 0 expires_at: null created_at: '2026-10-21T19:40:00Z' blocked: false requests_per_minute: 60 tokens_per_minute: null max_parallel_requests: 4 '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/TelnyxErrors' example: errors: - code: '10009' title: Authentication failed detail: >- The required authentication headers were either invalid or not included in the request. meta: url: https://developers.telnyx.com/docs/overview/errors/10009 '404': description: Not found content: application/json: schema: $ref: '#/components/schemas/TelnyxErrors' example: errors: - code: '10005' title: Resource not found detail: The requested resource or URL could not be found. meta: url: https://developers.telnyx.com/docs/overview/errors/10005 '409': description: The instance is not `ready` content: application/json: schema: $ref: '#/components/schemas/TelnyxErrors' example: errors: - code: '99901' title: Instance not ready detail: The instance is not ready; its engine is not running. '502': description: The instance's engine did not answer content: application/json: schema: $ref: '#/components/schemas/TelnyxErrors' example: errors: - code: '99903' title: Engine unavailable detail: The instance's engine did not answer; try again shortly. components: schemas: AgentGatewayKeyResponse: type: object required: - data properties: data: $ref: '#/components/schemas/AgentGatewayKey' TelnyxErrors: type: object properties: errors: type: array items: $ref: '#/components/schemas/TelnyxError' AgentGatewayKey: type: object description: A key on an instance, without its value. required: - id - name - team_id - models - max_budget - budget_resets_every - budget_resets_at - spend - expires_at - created_at - blocked - requests_per_minute - tokens_per_minute - max_parallel_requests properties: id: type: string description: >- Identifies the key. It is a 64-character hash the instance stores in place of the key's value. name: anyOf: - type: string - type: 'null' description: A label for people; `null` when none was given. team_id: anyOf: - type: string - type: 'null' description: The team the key belongs to, if any. models: type: array items: type: string description: >- The models the key may use. Empty means every model the instance serves. max_budget: anyOf: - type: number - type: 'null' description: The most the key may spend, in USD, until its budget resets. budget_resets_every: anyOf: - type: string - type: 'null' description: How often the key's spend resets, such as `30d`. budget_resets_at: anyOf: - type: string format: date-time - type: 'null' description: When the key's spend next resets. spend: type: number description: What the key has spent since its budget last reset, in USD. expires_at: anyOf: - type: string format: date-time - type: 'null' description: When the key stops working; `null` when it does not expire. created_at: anyOf: - type: string format: date-time - type: 'null' description: When the key was issued. blocked: type: boolean description: Whether the instance refuses the key. requests_per_minute: anyOf: - type: integer - type: 'null' description: The most requests the key may make per minute. tokens_per_minute: anyOf: - type: integer - type: 'null' description: The most tokens the key may use per minute. max_parallel_requests: anyOf: - type: integer - type: 'null' description: The most requests the key may have in flight at once. TelnyxError: type: object properties: code: type: string title: type: string detail: type: string source: type: object properties: pointer: type: string parameter: type: string meta: type: object properties: url: type: string securitySchemes: bearerAuth: type: http scheme: bearer description: Telnyx API key ````