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 apideck-libraries/api-skills --skill nmbrsgit clone --depth 1 https://github.com/apideck-libraries/api-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/apideck-libraries/api-skills/nmbrs)<a href="https://agentmods.dev/skills/apideck-libraries/api-skills/nmbrs"><img src="https://agentmods.dev/badge/skills/apideck-libraries/api-skills/nmbrs/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/apideck-libraries/api-skills/nmbrs"><img src="https://agentmods.dev/badge/skills/apideck-libraries/api-skills/nmbrs.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 | $0.00077 | $0.01995 |
| Opus 5.5 | $0.00031 | $0.00798 |
| Sonnet 5.5 | $0.00015 | $0.00399 |
| Haiku 4.5 | $0.00008 | $0.00199 |
Grade A, and why
nmbrs 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 15d 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 'https://unify.apideck.com/connector/connectors/nmbrs' \ This is a copy
84% identical to acerta — 80 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Visma Nmbrs (via Apideck)
Access Visma Nmbrs through Apideck's HRIS unified API — one of 58 HRIS connectors that share the same method surface. Code you write here ports to BambooHR, Workday, Deel and 54 other HRIS connectors by changing a single serviceId string. Apideck handles auth, pagination, rate limiting, and retries so you don't write per-tenant Visma Nmbrs plumbing.
Quick facts
- Apideck serviceId:
nmbrs - Unified API: HRIS
- Auth type: oauth2
- Gotchas: page
- Visma Nmbrs docs: https://support.nmbrs.com
- Homepage: https://www.nmbrs.com
At a glance
- Implementation difficulty: moderate — Demo Validation Required for Production Subscription
- Vendor partnership required: yes (Nmbrs App Store) — Joining gives the production subscription, approved after a demo video and the Ready-to-demo form.
- Apideck-managed credentials: available — For testing only, through a shared Apideck partner app.
- Account type required: A Nmbrs Payroll (formerly Nmbrs) environment.
- Consumer access level: A client login or company login created at debtor level; a master login in an Accountant environment does not work.
- Sandbox: available (signup) — Free demo environment: sign up with a domain named extdev-{AppName} and affiliate code DEMO, or it is deleted after 30 days.
- Costs: Nmbrs publishes no fee for API access.
- Rate limits: Set by the developer-portal subscription product; the development subscription has lower limits than the production one.
- Authentication: Authorization Code flow with pushed authorization requests; a Nmbrs subscription key is also sent with each call.
- Webhooks: Virtual webhooks - employee created and updated events, detected by polling.
Facts synced from Apideck's connector metadata API —
GET /connector/connectors/nmbrs(overviewfield) is the live, authoritative version.
What ships with it
1 file 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.
- 15d ago Changed · +18 lines 4f54fc45c31e
- 1mo ago First seen · 128 lines · 77 tokens per session scan A 7c3ac3570e18
nmbrs is a skill published in the GitHub repository apideck-libraries/api-skills (5 stars, last pushed yesterday), licensed Apache-2.0. It adds 77 tokens to every session and 1,995 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 84% identical to acerta, differing in 80 lines, and is treated as a copy.
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