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 commands/jbwashington/ebay-mcp/ebay-authgit clone --depth 1 https://github.com/jbwashington/ebay-mcpWrote 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/commands/jbwashington/ebay-mcp/ebay-auth)<a href="https://agentmods.dev/commands/jbwashington/ebay-mcp/ebay-auth"><img src="https://agentmods.dev/badge/commands/jbwashington/ebay-mcp/ebay-auth.svg" alt="Measured on agentmods" 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 | $0.00005 | $0.00155 |
| Opus 5 | $0.00003 | $0.00077 |
| Sonnet 5 | $0.00001 | $0.00031 |
| Haiku 4.5 | $0.00001 | $0.00015 |
Grade A, and why
ebay-auth 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 6d 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.
What it actually says
eBay OAuth Authentication
Authenticate with eBay to get a refresh token for API access.
Instructions
Run the authentication script:
!`bun run auth`
This will:
- Start a local web server on port 3000
- Open your browser to eBay's authorization page
- After you grant access, save the refresh token to
.env.production.local - The token is valid for 18 months
If you prefer to use the sandbox environment:
!`EBAY_ENV=sandbox bun run auth`
The refresh token will be automatically used by the eBay MCP server for all API calls.
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.
- 6d ago First seen · 31 lines · 5 tokens per session scan A c41b80afac39
ebay-auth is a command published in the GitHub repository jbwashington/ebay-mcp (13 stars, last pushed 6mo ago), licensed MIT. It adds 5 tokens to every session and 155 once invoked, about $0.0000 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.
Other commands, from other repositories
dev
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validate-idea
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intake
You are running the intake for this purchase. The goal is to populate spec.md at the repo root with the per-purchase brief.
price-strategy
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price-strategy
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product-copy
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