Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/HybridAIOne/hybridclawnpx agentmods add skills/hybridaione/hybridclaw/fastbillWrote 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/hybridaione/hybridclaw/fastbill)<a href="https://agentmods.dev/skills/hybridaione/hybridclaw/fastbill"><img src="https://agentmods.dev/badge/skills/hybridaione/hybridclaw/fastbill/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/hybridaione/hybridclaw/fastbill"><img src="https://agentmods.dev/badge/skills/hybridaione/hybridclaw/fastbill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00027 | $0.01656 |
| Opus 5 | $0.00014 | $0.00828 |
| Sonnet 5 | $0.00005 | $0.00331 |
| Haiku 4.5 | $0.00003 | $0.00166 |
Grade A, and why
fastbill scanned grade A with 1 finding 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
`curl`, ad hoc `node -e`, `grep`, or shell parsing for FastBill. How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FastBill
Use this skill for FastBill invoices, customers, payments, reminders, and document metadata. The helper wraps concrete FastBill API services: it serializes JSON-shaped inputs to XML and parses XML responses.
Core Rules
- Use the helper plus built-in
http_requestfor live API calls. Do not usecurl, ad hocnode -e,grep, or shell parsing for FastBill. - FastBill API URL:
https://my.fastbill.com/api/1.0/api.php. The/api/1.0/prefix is only for secret-route matching. - Basic auth is injected by the gateway from
FASTBILL_BASIC_AUTH. Never print, build, or ask for the FastBill API key. - Writes require explicit operator intent and
--operator-grant. Prefer--dry-runwhen converting free text, CSV, or time tracking into invoice data. - Prefer invoice IDs for writes. If multiple invoices/customers match, ask for the exact ID before writing.
- If unsure about a service or field, check
https://apidocs.fastbill.com.
Commands
Show commands:
node skills/fastbill/fastbill.cjs --help
Build an http_request payload for the built-in http_request tool:
node skills/fastbill/fastbill.cjs http-request invoice.get --filter-json '{"INVOICE_ID":"123"}'
node skills/fastbill/fastbill.cjs http-request customer.create --data-json '{"CUSTOMER_TYPE":"business","ORGANIZATION":"Acme GmbH","COUNTRY_CODE":"DE"}' --operator-grant
Parse a saved http_request response wrapper/body:
node skills/fastbill/fastbill.cjs parse-response --body-file /tmp/fastbill-response.json
Direct helper network calls are only for operator-controlled shell tests with a valid gateway token already exported:
node skills/fastbill/fastbill.cjs request invoice.get --filter-json '{"INVOICE_ID":"123"}'
Common invoice payloads:
node skills/fastbill/fastbill.cjs http-request invoice.get --filter-json '{"END_DUE_DATE":"2026-04-08"}' --limit 100
node skills/fastbill/fastbill.cjs http-request invoice.create --data-json '{"CUSTOMER_ID":"123","INVOICE_TITLE":"Consulting Januar - Juni 2026","ITEMS":{"ITEM":[{"DESCRIPTION":"Consulting","QUANTITY":"8","UNIT_PRICE":"120.00","VAT_PERCENT":"19"}]}}' --operator-grant
node skills/fastbill/fastbill.cjs http-request invoice.update --data-json '{"INVOICE_ID":"456","INVOICE_TITLE":"YouGov SVOD Januar - Juni 2026"}' --operator-grant
node skills/fastbill/fastbill.cjs http-request invoice.setpaid --data-json '{"INVOICE_ID":"456","PAID_DATE":"2026-05-07","PAYMENT_METHOD":"bank transfer"}' --operator-grant
node skills/fastbill/fastbill.cjs http-request invoice.sendbyemail --data-json '{"INVOICE_ID":"456","RECIPIENT":{"TO":"[email protected]"},"SUBJECT":"Payment reminder","MESSAGE":"Please review the outstanding invoice and payment status."}' --operator-grant
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 149 lines · 27 tokens per session scan A 430a82fabac9
fastbill is a skill published in the GitHub repository HybridAIOne/hybridclaw (132 stars, last pushed today), licensed MIT. It adds 27 tokens to every session and 1,656 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
ai-sdk
Answer questions about the AI SDK and help build AI-powered features. Use when developers: (1) Ask about AI SDK functions like generateText, streamText, ToolLoopAgent, embed, or tools, (2) Want to build AI agents, chatbots, RAG systems, or text generation features, (3) Have questions about AI providers (OpenAI…
tushare
A Python interface for Tushare, a financial data service that provides market and company information for stocks, funds, futures, and digital assets. It returns queried data as pandas tables.
status
Show whether Mem0 memory is working in this repository, covering configuration, capture state, pending flushes, and whether the Mem0 API key is valid. Use when the user asks whether memory is on, why a memory is missing, or anything looks broken.
mem0-test-integration
Verify a Mem0 integration produced by /mem0-integrate. Runs in the same workspace on the same branch (loose coupling) — installs dependencies, runs the repo's native test suite, then exercises a real end-to-end smoke flow against the user's API key. Produces a scorecard. TRIGGER when: user has just run /mem0-integrate…
mem0-oss-to-platform
Plan and then execute a migration of a project from the mem0 open-source / self-hosted SDK (the local Memory class) to the mem0 Platform / hosted / managed SDK (the MemoryClient class). Use this whenever a developer wants to move, switch, or migrate their mem0 usage off OSS/self-hosted to the hosted API — e.g.…
azure-search-documents-dotnet
Azure AI Search SDK for .NET (Azure.Search.Documents). Use for building search applications with full-text, vector, semantic, and hybrid search. Covers SearchClient (queries, document CRUD), SearchIndexClient (index management), and SearchIndexerClient (indexers, skillsets). Triggers: "Azure Search .NET"…