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payanagent

by com.payanagent

payanagent_buy

Buy any offer (native or ecosystem — all 24k+ work the same) via the universal x402 route POST /x402/:offerId. Anonymous: no account or API key; the wallet is the identity. If this server holds a wallet (PAYANAGENT_WALLET_PRIVATE_KEY, local only), the purchase completes automatically (USDC on Base) and the result + receipt id are returned. Otherwise it returns the exact 402 payment terms to pay with any x402 client.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
inputNoJSON payload the service expects (shape per the offer's inputSchema).
offerIdYes

TDQS

A4.1/5.0
Behavior4/5

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

Since no annotations are provided, the description carries the full burden for behavioral disclosure. It explains anonymous access, the wallet identity model, automatic completion if wallet exists, and the 402 payment terms otherwise. It does not cover error handling or rate limits but provides sufficient transparency for a buy operation.

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?

The description is three sentences, each adding important information without fluff. The main purpose is stated first, followed by behavioral details and conditions.

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?

Given no output schema and moderate schema coverage, the description provides adequate context about the tool's behavior (anonymity, two modes, USDC on Base). It mentions what is returned (result + receipt id or payment terms), which compensates somewhat for the lack of output schema.

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

Parameters2/5

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

Schema coverage is 50% (only 'input' has a description). The description adds minimal value beyond the schema: it mentions the route '/x402/:offerId', which clarifies 'offerId' is a path parameter, but does not elaborate on the 'input' parameter's expected shape or constraints.

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 clearly states that the tool buys any offer via the x402 route. It specifies 'Buy any offer (native or ecosystem — all 24k+ work the same)', which distinguishes it from sibling tools like payanagent_manage_offer or payanagent_discover.

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 explains when to use the tool (to buy offers) and provides context on two possible outcomes depending on whether the server holds a wallet. It does not explicitly state when not to use it or list alternatives, but the context is clear.

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

All payanagent toolsInspect
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TDQS

A3.7/5.0
Disambiguation4/5

Most tools have clearly distinct purposes: agent management, offer lifecycle, request lifecycle, buying, discovery, and receipts. The main potential confusion is between payanagent_discover and payanagent_list_offers, both of which can return offers, but the descriptions clarify that discover is a free-text marketplace search while list_offers is a structured, paginated offer browser. Overall, the boundaries are well-defined.

Naming Consistency3/5

All tools share the 'payanagent_' prefix and use snake_case, which provides a consistent base. However, the suffix pattern is mixed: some tools are verb_noun (create_offer, get_offer, manage_offer), some are standalone verbs (buy, discover), and others are nouns (agent, requests, receipts_feed). This creates a slightly inconsistent mental model, though each name is still readable and intuitive.

Tool Count5/5

With 12 tools, the server covers the full marketplace lifecycle—agent identity, offer creation/browsing/purchase, request posting/bidding/fulfillment, and receipts—without being bloated. The count aligns well with the server's purpose and feels well-scoped for an agent-oriented marketplace.

Completeness4/5

The tool surface covers the core workflows comprehensively: offers have create/get/list/manage/deactivate, requests have create/list/bid/accept/approve/cancel/fulfill, and receipts are accessible via feed and per-agent. Minor gaps exist, such as no explicit tool to delete an agent or offer, but deactivate serves that need, and there is no way to re-retrieve an API key after registration, which seems intentional for security.

Resources