> ## Documentation Index > Fetch the complete documentation index at: https://docs.jojapi.com/llms.txt > Use this file to discover all available pages before exploring further. # Response Headers for API Consumers > Learn about the headers generated by API Gateway. The gateway attaches informational headers to every response it returns. This page describes each of them. * **X-Jojapi-Gateway-Response**: Always has the value `true`. Its presence indicates that the response body was generated by the gateway rather than the upstream API — see [Gateway Generated Responses](/gateway/gateway-generated-responses) for details. * **X-Jojapi-Request-Latency**: Specifies the completion time for the current request on the gateway. The duration of the request measured by the consumer may be longer. * **X-Jojapi-User-Balance**: Specifies the remaining user balance after the current request has been processed. Sent on pay-as-you-go plans only. * **PAYMENT-RESPONSE** / **Payment-Receipt**: On requests paid per call by an agent wallet, the settlement proof — a base64 x402 `SettlementResponse` (transaction, network, payer) or an MPP receipt. See [Agent payments](/consumers/agents). ## Per-object usage headers Usage is reported per [billable object](/credit-usage), keyed by the object's slug: * **X-Jojapi-\-Used**: The amount of this object consumed by the current request — e.g. `X-Jojapi-Credits-Used`, or `X-Jojapi-Ai-Tokens-Used` for an object with the slug `ai-tokens`. * **X-Jojapi-\-Remaining**: The remaining included quota for this object after the current request. Applies to fixed-price plans. * **X-Jojapi-\-Total-Used**: The total amount of this object consumed within the current period after this request. Applies to pay-as-you-go plans only. The default Credits object has the slug `credits`, so the long-standing `X-Jojapi-Credits-Used`, `X-Jojapi-Credits-Remaining` and `X-Jojapi-Credits-Total-Used` headers are unchanged — they are simply the Credits instance of the per-object scheme. ## Keys that hide these headers Responses to an API key with **Hide JoJ API headers** turned on carry none of the `X-Jojapi-*` headers on this page — for keys a bridge or reseller calls APIs with. Usage and billing are unchanged. See [Hiding JoJ API headers](/consumers/api-keys#hiding-joj-api-headers). This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.