Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add newline53/newline-mcp-server --skill payment-operationsgit clone --depth 1 https://github.com/newline53/newline-mcp-serverWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/newline53/newline-mcp-server/payment-operations)<a href="https://agentmods.dev/skills/newline53/newline-mcp-server/payment-operations"><img src="https://agentmods.dev/badge/skills/newline53/newline-mcp-server/payment-operations/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/newline53/newline-mcp-server/payment-operations"><img src="https://agentmods.dev/badge/skills/newline53/newline-mcp-server/payment-operations.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00071 | $0.00895 |
| Opus 5 | $0.00036 | $0.00447 |
| Sonnet 5 | $0.00014 | $0.00179 |
| Haiku 4.5 | $0.00007 | $0.00089 |
Grade A, and why
payment-operations scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Payment Operations
A general operations skill for transfer follow-up, exceptions, and issue resolution. Use this when the user is asking what happened after a payment was created.
Guardrails
- Do not assume a newly created transfer should already be settled.
- Investigate by UID whenever possible: transfer UID, transaction UID, return UID.
- Use returns and transaction events to explain failures before suggesting retries.
- If remediation would require creating another transfer, get user confirmation first.
Step 1 — Start from the Best Identifier Available
If you have a transfer UID
get-newline-transfer uid=<transfer_uid>
If you have a transaction UID
get-transaction uid=<transaction_uid>
If you have a return UID
get-return uid=<return_uid>
If you only have rough context
Use list endpoints to find the right record:
list-newline-transfers
list-transactions
list-returns
list-combined-transfers
Step 2 — Inspect the Transfer Record
From the transfer, capture:
uid,status,created_atsource_synthetic_account_uiddestination_synthetic_account_uidinitiating_customer_uiddestination_customer_uidusd_transfer_amounttransaction_uids- which rail block is populated:
wire,ach, orinstant_payment
If there is no transfer, continue from the transaction or return path instead.
Step 3 — Inspect Related Transactions
For each related UID:
get-transaction uid=<transaction_uid>
Record:
statustransaction_typeamount,currencysynthetic_account_uidcustodial_account_uidtransfer_uidbalance_after- timestamps and description
If you need broader context:
list-transactions transfer_uid=[<transfer_uid>]
Step 4 — Inspect Transaction Events
list-transaction-events
Filter for events tied to the transaction UID(s). Focus on:
- settlement progress
- failure states
- return-related events
- timing gaps between queued, pending, and settled states
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 160 lines · 71 tokens per session scan A 72a387e71dcf
payment-operations is a skill published in the GitHub repository newline53/newline-mcp-server (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 71 tokens to every session and 895 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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