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 hamzabellouch/agent-skills --skill open-banking-iso20022-apisgit clone --depth 1 https://github.com/hamzabellouch/agent-skillsWrote 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/hamzabellouch/agent-skills/open-banking-iso20022-apis)<a href="https://agentmods.dev/skills/hamzabellouch/agent-skills/open-banking-iso20022-apis"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/open-banking-iso20022-apis/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/hamzabellouch/agent-skills/open-banking-iso20022-apis"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/open-banking-iso20022-apis.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 | $0.02819 |
| Opus 5 | $0.00036 | $0.01409 |
| Sonnet 5 | $0.00014 | $0.00564 |
| Haiku 4.5 | $0.00007 | $0.00282 |
Grade A, and why
open-banking-iso20022-apis 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 8d 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 — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Open Banking & ISO 20022 APIs Architecture
This skill package defines architectural guidelines, security controls, and production implementations for building Open Banking platforms, PSD2/PSD3 compliant Payment Initiation (PISP) and Account Information (AISP) services, and ISO 20022 financial messaging engines.
1. Security Architecture & Standards
FAPI (Financial-grade API 1.0/2.0) & OAuth 2.0 Security Profile
- Client Authentication: Enforce Mutual TLS (
tls_client_auth) orprivate_key_jwtwith asymmetric RSA-SHA256 (PS256) or ECDSA (ES256) key pairs. - Pushed Authorization Requests (PAR - RFC 9126): PISPs/AISPs must push authorization request parameters directly to the ASPSP authorization server via back-channel POST requests, obtaining an opaque
request_urito prevent front-channel tampering. - JWS Signature & Non-Repudiation: Payment initiation payloads must include detached HTTP Message Signatures (RFC 9421) signed with eIDAS QSealC (Qualified Electronic Seal Certificates).
mTLS & eIDAS Certificate Validation
- Transport Security: Enforce mutual TLS 1.3 using eIDAS QWAC (Qualified Website Authentication Certificates) to establish identity between Third-Party Providers (TPPs) and Account Servicing Payment Service Providers (ASPSPs).
- Certificate Revocation Checking: Validate TPP certificate status in real-time via OCSP stapling and CRL (Certificate Revocation List) checks against Qualified Trust Service Providers (QTSPs).
2. ISO 20022 Financial Messaging Matrix
| Message Identifier | Name | Domain | Primary Purpose |
|---|---|---|---|
pain.001.001.11 |
Customer Credit Transfer Initiation | Payments | TPP/Corporate initiates credit transfer to bank |
pacs.008.001.10 |
FI to FI Customer Credit Transfer | Clearing & Settlement | Interbank real-time settlement (SEPA Instant, FedNow) |
camt.053.001.10 |
Bank to Customer Statement | Account Management | Daily end-of-day account balance & statement |
camt.054.001.10 |
Bank to Customer Debit/Credit Notification | Notifications | Real-time transaction notification advisory |
pacs.002.001.12 |
Payment Status Report | Status Tracking | Real-time ACK/NACK status of payment processing |
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.
- 8d ago First seen · 242 lines · 71 tokens per session scan A 3d12471e479f
open-banking-iso20022-apis is a skill published in the GitHub repository hamzabellouch/agent-skills (4 stars, last pushed 1mo ago), licensed MIT. It adds 71 tokens to every session and 2,819 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 2026-09-03.
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