bouncer

bouncer is a skill for Claude Code, Codex from withoneai/one-agent-plugin. It costs 112 tokens per session (1,610 once invoked), scanned A, original, MIT.

An email-list checking service that identifies invalid, risky, and disposable email addresses. It can be accessed through One to read and update Bouncer verification data.

In plain words
What is it for?
Use it to verify individual addresses or batches of addresses and manage email-verification jobs and results.
Why use it?
It helps prevent campaigns from being sent to unusable addresses, which can lead to bounced emails and poorer delivery rates.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to verify individual addresses or batches of addresses and manage email-verification jobs and results.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/withoneai/one-agent-plugin/bouncer
Install

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.

Any agent
npx skills add withoneai/one-agent-plugin --skill bouncer
Clone the repo
git clone --depth 1 https://github.com/withoneai/one-agent-plugin

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for bouncer

README.md
[![agentmods](https://agentmods.dev/badge/skills/withoneai/one-agent-plugin/bouncer/github.svg)](https://agentmods.dev/skills/withoneai/one-agent-plugin/bouncer)
Your own site
<a href="https://agentmods.dev/skills/withoneai/one-agent-plugin/bouncer"><img src="https://agentmods.dev/badge/skills/withoneai/one-agent-plugin/bouncer/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.

agentmods 80×15 button for bouncer

Your own site · 80×15
<a href="https://agentmods.dev/skills/withoneai/one-agent-plugin/bouncer"><img src="https://agentmods.dev/badge/skills/withoneai/one-agent-plugin/bouncer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,610 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00112 $0.01610
Opus 5 $0.00056 $0.00805
Sonnet 5 $0.00022 $0.00322
Haiku 4.5 $0.00011 $0.00161

Measured 5d ago against content hash aec212a70b3e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

bouncer 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 5d 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.

platforms/one-bouncer/skills/bouncer/SKILL.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bouncer through One

A cloud-based platform that verifies and cleans email lists by identifying invalid, risky, or disposable email addresses to improve deliverability, reduce bounce rates, and enhance email campaign performance.

One exposes Bouncer through four MCP tools. The table below carries real action ids from One's knowledge base, so for a common operation you can skip search and go straight to reading the action's parameters.

How to run an action

  1. Find the action in the table below, or call search_one_platform_actions with platform bouncer if it is not listed.
  2. Call get_one_action_knowledge with the action id. Do this every time, including for actions in this table. The table gives you the id, not the parameters.
  3. Call execute_one_action with parameters copied from that knowledge.

Never guess a parameter name, a body field, or an enum value. The knowledge has the real schema, and a guessed field is either a 400 or a silent write of the wrong thing.

Before you start

Call list_one_integrations once and confirm Bouncer is connected. If it is missing, the user has not connected it: say so and point them at https://app.withone.ai rather than reaching for raw HTTP.

Each connection carries an access field. If it reports {"policy": "methods", "methods": ["GET"]} the agent is read-only here, so plan a read-only answer instead of attempting a write that will be refused.

Before a write

Creates, updates, deletes and sends land on a real Bouncer account and cannot be recalled. State the action and the specific target in one line before the first write in a task, and let the user stop you. Reads need no confirmation.

Actions

ToxicityListJob

Action Method Path Action id
Check Toxicity List Job Status GET /v1/toxicity/list/{{ID}} conn_mod_def::GJt2_yOF4b8::lk0kG1xvSwCGjTbcjiRnTg
Create Toxicity List Job POST /toxicity/list conn_mod_def::GJt2_qnzVsc::oM2wSVqbQk2C4s78_u2o1w
Delete a Toxicity List Job DELETE /v1/toxicity/list/{{id}} conn_mod_def::GJt2_5jg-88::_4wxHQGYRtGUgPnX3sNOJA

Read the full file on GitHub · 108 lines

Changes

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.

  1. 5d ago First seen · 108 lines · 0 tokens per session scan A aec212a70b3e

Subscribe to this mod's changes

bouncer is a skill published in the GitHub repository withoneai/one-agent-plugin (1 stars, last pushed 19d ago), licensed MIT. It adds 112 tokens to every session and 1,610 once invoked, about $0.0006 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 2026-09-03.

Related

Other skills, from other repositories