Boundra — Payment Approval Gateway for AI Agents

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Allow, ask, or veto — a policy decision point your agent consults before signing any payment

Finance & Payments

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evaluate_payment

Evaluate a payment intent. MUST be called before executing any payment. ALLOW = you may pay; DENY = you must abandon; ASK = a challenge is returned — relay the reason to the user, then retry with approval_token once the user signs. An optional mandate parameter carries a user-issued single-task authorization.

amountnumber, required

purposestring, required

recipientstring, required

ownerstring

mandatestring

agent_idstring

approval_tokenstring

source_contentstring

expected_amountstring

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Tools (11)

evaluate_payment

Argument	Type	Description
owner	any
amount*	number
mandate	any
purpose*	string
agent_id	any
recipient*	string
approval_token	any
source_content	string
expected_amount	any

Input schema (JSON)

{
  "type": "object",
  "title": "evaluate_paymentArguments",
  "required": [
    "amount",
    "recipient",
    "purpose"
  ],
  "properties": {
    "owner": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Owner",
      "default": null
    },
    "amount": {
      "type": "number",
      "title": "Amount"
    },
    "mandate": {
      "anyOf": [
        {
          "type": "object",
          "additionalProperties": true
        },
        {
          "type": "null"
        }
      ],
      "title": "Mandate",
      "default": null
    },
    "purpose": {
      "type": "string",
      "title": "Purpose"
    },
    "agent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Id",
      "default": null
    },
    "recipient": {
      "type": "string",
      "title": "Recipient"
    },
    "approval_token": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Approval Token",
      "default": null
    },
    "source_content": {
      "type": "string",
      "title": "Source Content",
      "default": ""
    },
    "expected_amount": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Expected Amount",
      "default": null
    }
  }
}

get_audit_trail

View recent payment-approval audit records for an owner

Argument	Type	Description
limit	integer
owner*	string

Input schema (JSON)

{
  "type": "object",
  "title": "get_audit_trailArguments",
  "required": [
    "owner"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "title": "Limit",
      "default": 10
    },
    "owner": {
      "type": "string",
      "title": "Owner"
    }
  }
}

get_policy

View the active signed payment policy for an owner (and optionally an agent scope)

Argument	Type	Description
owner*	string
agent_id	any

Input schema (JSON)

{
  "type": "object",
  "title": "get_policyArguments",
  "required": [
    "owner"
  ],
  "properties": {
    "owner": {
      "type": "string",
      "title": "Owner"
    },
    "agent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Id",
      "default": null
    }
  }
}

get_policy_versions

View a user's policy version history (version chain + hashes, verifiable against on-chain commitments)

Argument	Type	Description
owner*	string

Input schema (JSON)

{
  "type": "object",
  "title": "get_policy_versionsArguments",
  "required": [
    "owner"
  ],
  "properties": {
    "owner": {
      "type": "string",
      "title": "Owner"
    }
  }
}

get_spend_report

View today's spend summary for an owner

Argument	Type	Description
owner*	string

Input schema (JSON)

{
  "type": "object",
  "title": "get_spend_reportArguments",
  "required": [
    "owner"
  ],
  "properties": {
    "owner": {
      "type": "string",
      "title": "Owner"
    }
  }
}

list_policy_requests

List pending agent policy-change requests

No arguments.

Input schema (JSON)

{
  "type": "object",
  "title": "list_policy_requestsArguments",
  "properties": {}
}

list_templates

List policy templates (personal assistant / travel / dev API / procurement)

No arguments.

Input schema (JSON)

{
  "type": "object",
  "title": "list_templatesArguments",
  "properties": {}
}

render_template

Render a natural-language rule from a template + parameters (then compile, sign & publish)

Argument	Type	Description
daily	any
per_tx	any
ask_above	any
whitelist*	array
template_id*	string

Input schema (JSON)

{
  "type": "object",
  "title": "render_templateArguments",
  "required": [
    "template_id",
    "whitelist"
  ],
  "properties": {
    "daily": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Daily",
      "default": null
    },
    "per_tx": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Per Tx",
      "default": null
    },
    "ask_above": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Ask Above",
      "default": null
    },
    "whitelist": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "title": "Whitelist"
    },
    "template_id": {
      "type": "string",
      "title": "Template Id"
    }
  }
}

request_policy_change

[For agents] Ask the user for a policy/budget change (e.g. 'raise daily budget from 50 to 80'). The request is queued for user approval; the user signs and publishes a new policy version. Agents can NEVER change policy directly.

Argument	Type	Description
reason*	string
request*	string
agent_id*	string

Input schema (JSON)

{
  "type": "object",
  "title": "request_policy_changeArguments",
  "required": [
    "agent_id",
    "request",
    "reason"
  ],
  "properties": {
    "reason": {
      "type": "string",
      "title": "Reason"
    },
    "request": {
      "type": "string",
      "title": "Request"
    },
    "agent_id": {
      "type": "string",
      "title": "Agent Id"
    }
  }
}

revoke_policy

[USER ONLY] Revoke a policy chain (takes effect immediately; subsequent payments default to DENY). Must carry the user's wallet signature over the revocation statement.

Argument	Type	Description
owner*	string
scope*	string
agent_id	any
signature*	string
created_at*	number
revoked_through*	integer

Input schema (JSON)

{
  "type": "object",
  "title": "revoke_policyArguments",
  "required": [
    "owner",
    "scope",
    "revoked_through",
    "created_at",
    "signature"
  ],
  "properties": {
    "owner": {
      "type": "string",
      "title": "Owner"
    },
    "scope": {
      "type": "string",
      "title": "Scope"
    },
    "agent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Id",
      "default": null
    },
    "signature": {
      "type": "string",
      "title": "Signature"
    },
    "created_at": {
      "type": "number",
      "title": "Created At"
    },
    "revoked_through": {
      "type": "integer",
      "title": "Revoked Through"
    }
  }
}

set_policy

[USER ONLY] Submit a new policy version. Must carry the user's wallet EIP-191 signature over the policy document; accepted only after signature + version-chain checks pass. Agents MUST NOT call this tool.

Argument	Type	Description
owner*	string
scope*	string
nl_rule*	string
version*	integer
agent_id	any
prev_hash*	string
signature*	string
created_at*	number

Input schema (JSON)

{
  "type": "object",
  "title": "set_policyArguments",
  "required": [
    "owner",
    "scope",
    "version",
    "nl_rule",
    "prev_hash",
    "created_at",
    "signature"
  ],
  "properties": {
    "owner": {
      "type": "string",
      "title": "Owner"
    },
    "scope": {
      "type": "string",
      "title": "Scope"
    },
    "nl_rule": {
      "type": "string",
      "title": "Nl Rule"
    },
    "version": {
      "type": "integer",
      "title": "Version"
    },
    "agent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Id",
      "default": null
    },
    "prev_hash": {
      "type": "string",
      "title": "Prev Hash"
    },
    "signature": {
      "type": "string",
      "title": "Signature"
    },
    "created_at": {
      "type": "number",
      "title": "Created At"
    }
  }
}