Hermes agent fails validation of iss parameter issued by the remote mcp

[Im5tu]

MCP Client

Other (please specify below)

MCP Client Version

Hermes

Authentication Type

OAuth

OAuth Scopes (if applicable)

No response

MCP Server Configuration

`/opt/data/config.yaml`


mcp_servers:
  cloudflare:
    url: https://mcp.cloudflare.com/mcp?codemode=false
    auth: oauth
    enabled: true
    tools:
      exclude:
        - docs
        - '*_radar_*'
        - '*_accounts_magic_*'
        - '*_accounts_mnm_*'
        - '*_accounts_cni_*'
        - '*_accounts_teamnet_*'
        - '*_accounts_cloudforceone_*'
        - '*_accounts_dlp_*'
        - '*_accounts_devices*'
        - '*_accounts_dex_*'
        - '*_accounts_datasecurity_*'
        - '*_accounts_emailsecurity_*'
        - '*_accounts_scim_*'
        - '*_accounts_gateway*'
        - '*_accounts_zerotrust_*'
        - '*_accounts_one_*'
        - '*_accounts_brandprotection_*'
        - '*_accounts_intel_*'
        - '*_accounts_urlscanner_*'
        - '*_accounts_vuln_scanner_*'
        - '*_zones_securitycenter_*'
        - '*_accounts_securitycenter_*'
        - '*_zones_api_gateway_*'
        - '*_zones_schema_validation*'
        - '*_zones_token_validation*'
        - '*_zones_waiting_rooms*'
        - '*_accounts_addressing_*'
        - '*_accounts_shares*'
        - '*_accounts_slurper_*'
        - '*_zones_web3_*'
        - '*_accounts_flagship_*'
        - '*_zones_secondary_dns_*'
        - '*_accounts_secondary_dns_*'
        - '*_user_load_balancers*'

Failing Endpoint / Tool

No response

Bug Description

Setting up a new hermes agent and using the built in connector to authenticate the MCP via OAuth.

Hit the same issue as described here: NousResearch/hermes-agent#99984 - specifically bug 1 with the iss parameter validation.

Thought best to raise here for visibility as well

Steps to Reproduce

1. Setup new hermes agent
2. Use built in connector to auth to cloudflare mcp
3. Witness the iss parameter validation error appearing in the hermes UI

Expected Behavior

OAuth flow to work as normal

Actual Behavior

Hermes rejects due to missing iss parameter

Relevant Logs / Error Output

Additional Context

No response