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agentpay — card-funded wallets for AI agents

by com.entangleit
OverviewDiscussionsAdmin

Create upgrade link

create_upgrade_link

Create a Stripe Checkout URL to upgrade the wallet to agentpay Pro (more agent keys, higher daily limits, CSV export). Hand the URL to the human who owns the wallet.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "create_upgrade_link"
  }
}

Input Schema

NameRequiredDescriptionDefault
keyNoAgent key (agp_…). Optional when the MCP connection sends Authorization: Bearer.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A4.2/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It transparently states that the tool creates a Stripe Checkout URL rather than directly performing the upgrade, and it specifies what to do with the result. It could add more about auth or side effects, but the main behavior is clear.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, each earning its place: the first states the action, target, and benefits; the second states the intended recipient of the URL. There is no filler or redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with one optional parameter and no output schema, the description is nearly complete: it conveys the action, the artifact type, and the follow-up action. It does not explicitly describe the response shape, but 'Hand the URL...' implies the URL is returned.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% for the only parameter (key), so the schema already explains it. The description adds no additional meaning about the key or when to supply it, so a baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('Create') and names a concrete resource ('Stripe Checkout URL') with a clear outcome ('upgrade the wallet to agentpay Pro'). It also lists the benefits, which distinguishes it from sibling tools like create_topup_link.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description clearly states the target use case: generating a checkout URL to upgrade to agentpay Pro. It also instructs the agent to hand the URL to the wallet owner. It does not explicitly name alternatives or exclusions, but the intended context is evident.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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