> For the complete documentation index, see [llms.txt](https://firstoken.gitbook.io/api-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://firstoken.gitbook.io/api-docs/api-reference/proxy/allowed-headers.md).

# Allowed Headers

In Proxy these are the accepted headers

<table><thead><tr><th width="170.33333333333331">Name</th><th width="357">Description</th><th>Type</th></tr></thead><tbody><tr><td>ft-url-destiny</td><td>URL which proxy API will send the request after replace the token values. The destination URL will serve as the base URL for the proxy request, this URL will be the URL that the proxy API will send the request after replace the token values.</td><td>Required</td></tr><tr><td>ft-access-key</td><td><p>Header containing the API key previously generated from the Firstoken portal. </p><p>This header is used to authenticate the request.</p></td><td>Required</td></tr><tr><td>ft-headers</td><td>JSON value with the headers that proxy have to add to the request. For example, can be added authorization headers in this field.</td><td>Optional</td></tr><tr><td>ft-encryption</td><td>JSON value with the properties required to apply an encryption in the selected values. The json must contain the properties: key with the RSA key, type with the encryption algorithm, is_partial with the true/false value.</td><td>Optional</td></tr><tr><td>ft-keep-response-format</td><td><p></p><p>Determines if the third-party response format should be preserved.</p><ul><li>true: Returns the raw response from the provider.</li><li>false (default): Returns the standard response normalized by the proxy.</li></ul></td><td>Optional</td></tr></tbody></table>


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