verfi

verfi is a skill for Claude Code, Codex from Verfi-io/verfi-mcp-server. It costs 68 tokens per session (1,356 once invoked), scanned A, original, MIT.

A consent-verification service for lead-generation forms. It records evidence that a person agreed to be contacted and lets a buyer check that evidence; TCPA is a US law governing certain marketing calls and messages.

In plain words
What is it for?
Adding consent capture to forms, checking lead consent, retaining consent sessions, and retrieving proof for disputes.
Why use it?
It helps prove whether a lead gave the required consent before someone contacts them, including when that consent is disputed.

Skill for Claude CodeCodex

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

Good fit Adding consent capture to forms, checking lead consent, retaining consent sessions, and retrieving proof for disputes.

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Install with agentmods
npx agentmods add skills/verfi-io/verfi-mcp-server/verfi
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 Verfi-io/verfi-mcp-server --skill verfi
Clone the repo
git clone --depth 1 https://github.com/Verfi-io/verfi-mcp-server

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 verfi

README.md
[![agentmods](https://agentmods.dev/badge/skills/verfi-io/verfi-mcp-server/verfi/github.svg)](https://agentmods.dev/skills/verfi-io/verfi-mcp-server/verfi)
Your own site
<a href="https://agentmods.dev/skills/verfi-io/verfi-mcp-server/verfi"><img src="https://agentmods.dev/badge/skills/verfi-io/verfi-mcp-server/verfi/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 verfi

Your own site · 80×15
<a href="https://agentmods.dev/skills/verfi-io/verfi-mcp-server/verfi"><img src="https://agentmods.dev/badge/skills/verfi-io/verfi-mcp-server/verfi.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,356 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00068 $0.01356
Opus 5 $0.00034 $0.00678
Sonnet 5 $0.00014 $0.00271
Haiku 4.5 $0.00007 $0.00136

Measured 9d ago against content hash 9c3c7d9180c7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-13, from the pricing page.

Security

Grade A, and why

verfi 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 9d 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 -H "Authorization: Bearer sk_YOUR_SECRET_KEY" \
plugin/skills/verfi/SKILL.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verfi captures verifiable proof of consumer consent. Publishers add a script tag to capture sessions; buyers verify consent via API before contacting leads.

When to Use This Skill

  • Adding consent capture to a web form
  • Checking if a lead has valid TCPA consent
  • Claiming sessions for long-term retention
  • Pulling machine-readable proof for disputes
  • Integrating Verfi into an existing lead gen pipeline

Quick Start

1. Capture Consent (Publisher)

Add the SDK to any page with a form:

<script src="https://sdk.verfi.io/v1/verfi.js" data-key="pk_YOUR_PUBLIC_KEY" async></script>

The SDK auto-detects forms, records interactions (mouse, clicks, keystrokes, scroll), and generates a Verfi ID (VF-xxxxxxxx) on form submission.

2. Verify Consent (Buyer)

curl -H "Authorization: Bearer sk_YOUR_SECRET_KEY" \
  https://api.verfi.io/tenant/v1/sessions/VF-a1b2c3d4/proof

Returns consent status, interaction metrics, form data, device info, and tamper verification. All PII is SHA-256 hashed.

3. Claim Session

curl -X POST -H "Authorization: Bearer sk_YOUR_SECRET_KEY" \
  https://api.verfi.io/tenant/v1/sessions/VF-a1b2c3d4/claim

Starts 3-year retention. Unclaimed sessions expire in 72 hours.

Authentication

Two key types:

Key Format Use
Public pk_... SDK script tag (client-side)
Secret sk_... API calls (server-side, Bearer token)

Secret keys have scopes: sessions:claim, sessions:unclaim, sessions:search, sessions:proof, sessions:expiration.

Generate keys in the Verfi dashboard under Integration > API Keys.

API Endpoints

Base URL: https://api.verfi.io/tenant/v1

All endpoints require Authorization: Bearer sk_... header.

Method Path Scope Description
GET /sessions List claimed sessions (paginated)
GET /sessions/{verfiID} sessions:search Look up session, verify PII hashes
GET /sessions/{verfiID}/proof sessions:proof Machine-readable proof data
POST /sessions/{verfiID}/claim sessions:claim Claim session (3-year retention)
POST /sessions/{verfiID}/unclaim sessions:unclaim Release session (30-day retention)
PUT /sessions/{verfiID}/expiration sessions:expiration Update expiration date

Read the full file on GitHub · 143 lines

Files

What ships with it

3 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.

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. 9d ago First seen · 143 lines · 68 tokens per session scan A 9c3c7d9180c7

Subscribe to this mod's changes

verfi is a skill published in the GitHub repository Verfi-io/verfi-mcp-server (0 stars, last pushed 10d ago), licensed MIT. It adds 68 tokens to every session and 1,356 once invoked, about $0.0003 per session on Opus 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 2026-09-04.

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