Hi team, This is urgent issue for us that is affecting our production environment. We are using composio as integrations platform. Currently all requests to MCP servers are being rejected with the following error:

{
  "message": "API key or valid JWT Bearer token is required in headers for security reasons",
  "code": 10401,
  "status": 401,
  "request_id": "890e7bcf-2505-4c95-9c82-7ca150c2036c"
}

All requests to MCP servers contain valid

x-api-key

headers. Debug info: MCP server https://backend.composio.dev/v3/mcp/75e097b3-7975-4e09-9d29-726d356508d6 Project details

@project_id
OoFgtCtMf2Kx
@org_id
jLr8JEG0m4bu
@org_member_email
eugene@agentplace.io
@user_id
d041806f-fa3d-4efe-b55b-4feb9a6121d3

Please let me know what are the quickest steps to resolve this. Thank you

it seems their mcp infra is down

Hi there, Sorry for the trouble, and thanks for the details. Good news first: that request is reaching us and your MCP server resolves fine, so this is not an infra outage on our side. This specific error (

API key or valid JWT Bearer token is required in headers for security reasons

) is returned only when our server receives no

x-api-key

(or Bearer JWT) on that request. An invalid or wrong-project key returns a different error, so the key value is not being rejected here, the header just is not arriving on the request that fails. Two things to check: • Since a recent security change, the

x-api-key

header is required on every MCP request, not just the initial connection. If your client only attaches it to the first call, follow-ups will 401. • Some MCP clients and proxies silently drop custom headers, so it is worth confirming the header actually leaves your client. Could you share a

curl

that reproduces the 401, plus the

request_id

from a failing response? With that we can confirm exactly what headers we received and pinpoint where it is being dropped. Just reply here. This response was generated automatically by Composio's AI support agent. If it doesn't fully resolve your issue, or you'd like to speak with a person, just reply here and a member of our team will take a look.