Malta Payments (Stripe — cards / Apple Pay)
Server Details
Malta payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.
- Status
- Unhealthy
- Last Tested
- Transport
- Streamable HTTP
- URL
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Tool Definition Quality
Average 4.4/5 across 6 of 6 tools scored.
Each tool has a distinct purpose: payment creation, subscription creation, status queries, cancellation, and refund. There is no overlap or ambiguity.
All tools follow a consistent verb_noun pattern with underscores (e.g., create_payment_link, query_subscription), making them predictable and easy to understand.
With 6 tools, the server is well-scoped for handling payments and subscriptions via Stripe. Each tool serves a necessary function without being excessive or too few.
The tool set covers the core lifecycle: creation, status checking, cancellation, and refund. Minor gaps like updating a subscription or listing multiple payments exist but are not critical for basic operations.
Available Tools
6 toolscancel_subscriptionADestructiveIdempotentInspect
Cancel a subscription. By default the subscription stays active until the end of the current paid period (fair to the buyer); pass immediate=true to cancel right now.
| Name | Required | Description | Default |
|---|---|---|---|
| id | Yes | session_id (cs_...) or subscription_id (sub_...) | |
| immediate | No | true = cancel immediately. Default false = cancel at period end. |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate destructiveHint=true, so tool is destructive. Description adds that default cancellation is 'fair to the buyer' and specifies behavior changes with immediate=true. No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences, no filler. Purpose is first, then usage details. Every word adds value.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Covers main behavior and parameter options. Missing return values (e.g., confirmation) and error scenarios, but adequate given simple tool and existing annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with clear parameter descriptions. The description echoes schema info and adds 'fair to the buyer' nuance, but does not add significant new meaning beyond schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb 'cancel' and the resource 'subscription'. It distinguishes from sibling tools which handle payment links, queries, and refunds, not cancellations.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly describes two usage modes: default (cancel at period end) and immediate (pass immediate=true). Does not mention alternatives like refund_payment but provides clear guidance on parameter usage.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_payment_linkAInspect
Create a payment link in EUR for Malta via Stripe (Checkout Sessions). Buyer pays with cards, Apple Pay / Google Pay — whatever is enabled on the Stripe account. Returns a hosted checkout URL the buyer opens to pay — payment completes automatically, no confirm step. Bring your own credentials via HTTP header (x-stripe-secret-key; free test credentials from dashboard.stripe.com never move real money). Money always flows buyer→Stripe→merchant; this service never touches funds. Optional: issue_invoice=true auto-creates a VAT-ready invoice (PDF + hosted page, emailed to the buyer) after payment; collect_tax_id=true collects the buyer's business tax ID (e.g. EU VAT number) at checkout and puts it on the invoice.
| Name | Required | Description | Default |
|---|---|---|---|
| amount_eur | Yes | Amount in EUR (decimals allowed), e.g. 5.0. Minimum 0.5. | |
| description | Yes | What this payment is for (shown to the buyer, ≤200 chars) | |
| success_url | No | Optional https URL to send the buyer to after payment. | |
| issue_invoice | No | true = Stripe automatically creates and emails a post-payment invoice (PDF + hosted invoice page). Ideal for B2B / VAT bookkeeping. Note: Stripe charges a small Invoicing fee per invoice issued. | |
| collect_tax_id | No | true = ask the buyer for their business tax ID (e.g. EU VAT number) on the checkout page; it appears on the invoice. Combine with issue_invoice for a VAT-compliant receipt. | |
| customer_email | No | Optional buyer email. |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond annotations, describes return value (hosted checkout URL), automatic payment completion, money flow (buyer→Stripe→merchant), authentication via header, test credential note, and optional invoice/tax behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single paragraph, informative but could be more structured. However, it is not overly verbose and includes all necessary details.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Covers all aspects: what it returns, how to authenticate, test credentials, money handling, and optional features. No output schema needed as return value is explained.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, but description adds context for issue_invoice and collect_tax_id, explaining their benefits and usage. Adds minimal value for amount_eur (decimals) but overall enriches parameter understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Clearly states the tool creates a payment link in EUR for Malta via Stripe Checkout Sessions. Distinguishes from sibling tools like cancel_subscription or create_subscription_link.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Describes when to use (creating payment links for buyers) and mentions optional features. Does not explicitly state when not to use, but sibling names provide clear alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_subscription_linkAInspect
Create a recurring subscription checkout link (monthly/yearly/weekly billing) via Stripe. The buyer opens the URL, enters their card once, and is then charged automatically every period until canceled. Amount is per billing period in the local currency major unit. Respects the same owner policy guardrails as payments (the per-period amount is checked before anything is created).
| Name | Required | Description | Default |
|---|---|---|---|
| interval | No | Billing period. Default "month". | |
| amount_eur | Yes | Amount charged per billing period (local currency major unit) | |
| description | Yes | What the subscription is for (shown to the buyer, <=200 chars) | |
| success_url | No | Optional https URL to send the buyer to after subscribing. | |
| customer_email | No | Optional buyer email (pre-filled at checkout; receipt goes there). |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint=false and destructiveHint=false. The description adds behavioral context: the link's lifecycle, automatic charging, and pre-creation validation. No contradictions. Adequate disclosure for a non-destructive creation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences, front-loaded with purpose and key details. No filler. Every sentence adds essential information. Highly efficient.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 5 parameters (2 required) and no output schema, the description sufficiently covers usage and behavior. It mentions guardrails and provides context for parameter choices. However, it could briefly note the optional success_url default or behavior, but not necessary for completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3. The description adds value by clarifying that 'amount_eur' is per billing period in local currency major unit and reinforces the interval enum options. This extra context aids proper parameter selection.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb 'Create', the resource 'recurring subscription checkout link', and specifies the billing options (monthly/yearly/weekly). It effectively distinguishes from sibling tools like create_payment_link by highlighting the recurring nature.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explains the typical user flow (buyer opens URL, enters card, automatic recurring charges) and mentions policy guardrails (per-period amount check). While it doesn't explicitly exclude scenarios, the context of recurring vs one-time payments is clear.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
query_payment_statusARead-onlyInspect
Check whether a Malta payment (created by create_payment_link) has been paid. Queries Stripe directly — pull-based, no webhook needed. paid=true when status is PAID. If the payment was created with issue_invoice=true, the result also includes invoice_url and invoice_pdf once paid.
| Name | Required | Description | Default |
|---|---|---|---|
| session_id | Yes | The session_id returned by create_payment_link |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond annotations (readOnlyHint, openWorldHint), the description adds that it queries Stripe directly and specifies the paid condition and invoice details. No contradictions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three sentences, each adding value: purpose, pull-based nature, condition and invoice info. No wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple read-only tool with one parameter, the description is sufficiently complete, covering the main result fields and a special case. Missing error scenarios but acceptable given annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%; the description does not add significant new meaning to the parameter beyond restating what the schema says.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool checks if a Malta payment has been paid, specifying the source (Stripe directly) and the paid condition. It distinguishes from siblings like cancel_subscription or refund_payment by focusing on payment status.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies when to use it: after creating a payment link, for pull-based status checks without webhooks. It does not explicitly mention when not to use it, 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.
query_subscriptionARead-onlyInspect
Check a subscription created by create_subscription_link. Accepts the session_id (cs_...) or subscription_id (sub_...). active=true when the subscription is ACTIVE or TRIALING; NOT_SUBSCRIBED_YET means the buyer has not completed checkout.
| Name | Required | Description | Default |
|---|---|---|---|
| id | Yes | session_id (cs_...) returned by create_subscription_link, or subscription_id (sub_...) |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true. The description adds behavioral details: it explains how to interpret active flag and status value. No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences, front-loaded with purpose. Every word adds value: states what it checks, acceptable IDs, and interpretation of status. No waste.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given a simple tool with one parameter, no output schema, and annotations present, the description provides all necessary context: what it checks, accepted inputs, and how to interpret the active field. Complete for the complexity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema already describes the id parameter. The description adds meaning by specifying the two acceptable ID formats (cs_... and sub_...) and their source from create_subscription_link.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool checks a subscription created by create_subscription_link. It specifies accepted IDs (session_id or subscription_id) and distinguishes from siblings like cancel_subscription and query_payment_status.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description tells when to use (after creating a subscription link) and explains the meaning of active=true and NOT_SUBSCRIBED_YET. It does not explicitly state when not to use or name alternatives, but the sibling list provides context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
refund_paymentADestructiveInspect
Refund a paid payment (created by create_payment_link). Full refund by default; pass amount for a partial refund where supported. Refunds respect the same owner policy guardrails (x-agentpay-max-amount) as payments — the amount is checked before anything is sent to the gateway.
| Name | Required | Description | Default |
|---|---|---|---|
| amount | No | Optional partial-refund amount in the local currency major unit. Omit for a full refund. | |
| session_id | Yes | The session_id of the paid payment (same id used by query_payment_status) |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds behavioral details beyond annotations: it states the amount is checked against guardrails before gateway submission. Annotations already indicate destructive hint true, so the description complements well.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences with no redundancy. Front-loads main purpose and provides essential details efficiently.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The description explains the main behavior and guardrails, but lacks information on return values or error handling. For a simple refund tool, this is adequate but not complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, and the description only reiterates schema info (e.g., 'pass amount for a partial refund'). No additional semantic value beyond schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool refunds a paid payment, with full or partial refund options. It distinguishes from sibling tools like create_payment_link and query_payment_status by specifying it is for refunding.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides explicit context that refunds respect owner policy guardrails, and indicates partial refund may not be universally supported. It does not explicitly exclude when not to use, but the purpose is clear.
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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