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 agentmods add skills/holon-run/uxc/blocknative-openapi-skillnpx skills add holon-run/uxc --skill blocknative-openapi-skillgit clone --depth 1 https://github.com/holon-run/uxcWhat 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 | $0.00033 | $0.01092 |
| Opus 5 | $0.00016 | $0.00546 |
| Sonnet 5 | $0.00007 | $0.00218 |
| Haiku 4.5 | $0.00003 | $0.00109 |
Grade A, and why
blocknative-openapi-skill 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 3d 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 — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Blocknative Gas Platform Skill
Use this skill to run Blocknative gas intelligence operations through uxc + OpenAPI.
Reuse the uxc skill for shared execution, auth, and error-handling guidance.
Prerequisites
uxcis installed and available inPATH.- Network access to
https://api.blocknative.com. - Access to the curated OpenAPI schema URL:
https://raw.githubusercontent.com/holon-run/uxc/main/skills/blocknative-openapi-skill/references/blocknative-gas.openapi.json
- A Blocknative API key for the full v1 surface.
Scope
This skill covers a read-first Blocknative gas intelligence surface:
- supported chain discovery
- gas price confidence estimates
- base fee and blob fee prediction
- pending gas distribution analysis
This skill does not cover:
- write operations
- transaction submission
- mempool event streaming
- broader Blocknative product areas outside the selected gas platform endpoints
Authentication
Blocknative uses Authorization header auth. Some discovery and gas reads can work without a key, but this skill standardizes on authenticated requests because basefee-estimates and distribution require a valid API key.
Configure one API-key credential and bind it to api.blocknative.com:
uxc auth credential set blocknative \
--auth-type api_key \
--api-key-header Authorization \
--secret-env BLOCKNATIVE_API_KEY
uxc auth binding add \
--id blocknative \
--host api.blocknative.com \
--scheme https \
--credential blocknative \
--priority 100
Validate the active mapping when auth looks wrong:
uxc auth binding match https://api.blocknative.com
Core Workflow
- Use the fixed link command by default:
command -v blocknative-openapi-cli- If missing, create it:
uxc link blocknative-openapi-cli https://api.blocknative.com --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/blocknative-openapi-skill/references/blocknative-gas.openapi.json blocknative-openapi-cli -h
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.
- 3d ago First seen · 115 lines · 33 tokens per session scan A d33619bea568
blocknative-openapi-skill is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed 24d ago), licensed MIT. It adds 33 tokens to every session and 1,092 once invoked, about $0.0002 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 2026-08-30.
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