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 bex-co/bex --skill bex-private-servicesgit clone --depth 1 https://github.com/bex-co/bexWrote 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/bex-co/bex/bex-private-services)<a href="https://agentmods.dev/skills/bex-co/bex/bex-private-services"><img src="https://agentmods.dev/badge/skills/bex-co/bex/bex-private-services/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/bex-co/bex/bex-private-services"><img src="https://agentmods.dev/badge/skills/bex-co/bex/bex-private-services.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 | $0.00099 | $0.01805 |
| Opus 5.5 | $0.00040 | $0.00722 |
| Sonnet 5.5 | $0.00020 | $0.00361 |
| Haiku 4.5 | $0.00010 | $0.00180 |
Grade A, and why
bex-private-services 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 yesterday.
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.
1. Retrieve the linked Markdown document directly with an available URL-fetching tool or HTTP client, such as `curl`. Do not substitute web-search summaries for the document. How it starts
The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bex Private Services
Private services are identical to web services except they have no public URL. They are reachable only by other bex services on the same private network (same region + workspace). Use them for internal APIs, microservices, gRPC servers, sidecar processes, and anything that should never face the internet.
When to Use
- Building an internal API or microservice behind a public gateway
- Running a gRPC, TCP, or other non-HTTP server that only your services call
- Deploying infrastructure components (Elasticsearch, ClickHouse, RabbitMQ)
- Choosing between a private service and a background worker
For public-facing HTTP services, use bex-web-services. For services that don't receive any traffic, use bex-background-workers.
Before configuring or troubleshooting private connectivity, read references/private-networking.md.
Before attaching or changing a persistent disk, read references/persistent-disks.md.
When choosing between a private service, web service, and worker, read references/service-types.md.
Private Service vs Background Worker
| Criterion | Private Service | Background Worker |
|---|---|---|
| Binds to a port | Yes (required) | No |
| Receives private network traffic | Yes | No |
| Sends outbound traffic | Yes | Yes |
| Has internal hostname | Yes | No |
| Use case | Internal APIs, gRPC, TCP servers | Queue consumers, async processors |
Rule of thumb: If the process listens on a port and other services call it, it's a private service. If it pulls work from a queue and never receives requests, it's a background worker.
How Private Services Work
- No
onbex.cosubdomain—not reachable from the internet - Reachable at
<service-name>:<port>on the private network by services in the same region and workspace - Can listen on any port (except restricted system ports)—not limited to HTTP or port 10000
- Supports any protocol: HTTP, gRPC, TCP, WebSocket, custom binary protocols
- Same build/deploy lifecycle as web services (build command, start command, pre-deploy)
- Supports persistent disks and Docker runtime. A disk-backed private service stays single-instance and cannot use autoscaling or zero-downtime deploys; follow
references/persistent-disks.mdfor details.
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.
- yesterday First seen · 192 lines · 99 tokens per session scan A 54f9927bdf9f
bex-private-services is a skill published in the GitHub repository bex-co/bex (577 stars, last pushed today), licensed Apache-2.0. It adds 99 tokens to every session and 1,805 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-10-29.
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