Perkdrop.click

Free tools, credits, and programs with eligibility, evidence, and original links.

Visit Perkdrop

The live app for All Gas is the chatgpt.site link above. A Cloudflare Workers copy also runs at https://perkdrop-click.sansynx.workers.dev. Do not submit the Workers URL as the live app.

See AGENTS.md for the code map and safe review instructions.

How it works

flowchart LR
    Visitor --> Sites["chatgpt.site"]
    Visitor --> Workers["Cloudflare Workers"]
    Visitor --> Mail["AgentMail inbox"]
    Sites --> Convex
    Workers --> Convex
    Mail -->|signed webhook| Convex
    Convex --> Firecrawl
    Admin -->|"token once, then hashed 12-hour session"| Convex
    Convex --> Catalog["Live catalog"]

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sequenceDiagram
    autonumber
    actor Visitor
    participant Mail as AgentMail
    participant Backend as Convex
    participant Crawler as Firecrawl
    actor Admin as Administrator
    alt Website submission
        Visitor->>Backend: Submit a public offer URL
    else Forwarded announcement
        Visitor->>Mail: Forward a public offer email
        Mail->>Backend: Signed inbound webhook
        Backend->>Backend: Verify signature, event ID, and inbox
    else Scheduled discovery
        Backend->>Crawler: Search five product intents every three hours
        Backend->>Crawler: Rotate published-offer hosts on a slower cadence
        Crawler-->>Backend: Up to 20 results per search
        Backend->>Backend: Apply the daily discovery budget, skip repeats, queue new links
    end
    Backend->>Backend: Normalize URLs and reserve shared intake limits
    alt URL already received
        Backend-->>Visitor: Reuse existing submission status
    else New URL
        Backend->>Crawler: Extract terms and source evidence
        Crawler-->>Backend: Structured candidate
        Backend->>Backend: Merge matching offer keys and assess trust and terms
        opt Candidate needs human review
            Backend-->>Admin: Show evidence and review reasons
            Admin->>Backend: Exchange the operator token for a hashed session
            Admin->>Backend: Approve or reject with that session
        end
        alt Approved and unexpired
            Backend->>Backend: Publish the offer and card fields
            Backend-->>Visitor: Live query updates the catalog
        else Pending or rejected
            Backend->>Backend: Keep the offer out of the catalog
        end
    end
    opt Later recheck, expiry, or takedown
        Backend->>Backend: Remove or flag the publication
        Backend-->>Visitor: Live query drops the offer
    end

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Three intake paths share one queue: a public URL on /submit, a forwarded email, or scheduled Firecrawl search. Matching offer keys and matching claim URLs merge duplicates, including the same perk with a new expiry date. Article roundups are not treated as the claim page. No domain is trusted by default. Finding a link does not publish it.

Rechecks take up to 25 due offers every two hours. Changed or repeatedly unverifiable offers leave the catalog pending review. Expired offers are removed.

Tech stack

Layer	Tools
Website	React 19, TanStack Start, TypeScript, Vite
Backend	Convex database, live queries, cron jobs, workflows
Discovery	Firecrawl search and structured extraction
Email intake	AgentMail inbound webhooks and receipts
Hosting	ChatGPT Sites, plus a Cloudflare Workers copy
Agent access	Browser-side WebMCP, where the browser supports it
Checks	Vitest, convex-test, GitHub Actions

Convex holds submissions, candidates, review history, and published offers. Firecrawl reads public pages. AgentMail accepts forwarded perk mail and sends a receipt for the extracted links. Live queries update the catalog without a website redeploy.

Provider logos use Simple Icons when the host is known, then the offer favicon, then initials. Icons do not establish trust.

Try the reviewer demo

Open the reviewer demo. No credential is required.

The public label AllGas2026 is a demo tag, not a production admin password. Decisions stay in the current tab. They cannot publish offers or call Firecrawl. The real /admin route exchanges the private token for a 12-hour tab session. Later admin requests send that session, not the token.

WebMCP

In browsers with WebMCP, agents can call perkdrop_navigate on the public site. The demo-only tools perkdrop_demo_list, perkdrop_demo_decide, and perkdrop_demo_reset register only on /reviewer-demo. This is document.modelContext, not a remote MCP server.

Run locally

Node 22.22.3+ and pnpm 11.21.0.

pnpm install --frozen-lockfile
pnpm exec convex dev

Use .env.example to add VITE_CONVEX_URL to the ignored .env.local created by Convex. Preserve its deployment selector. In another terminal:

pnpm run dev

Keep convex dev running. It writes your deployment's VITE_CONVEX_URL into the ignored .env.local. Use that URL, not someone else's Convex cloud host. pnpm run dev alone against a stopped local backend used to crash the homepage. Catalog loaders now fail closed.

Setting	Notes
VITE_CONVEX_URL	Public Convex client URL from convex dev. Do not copy another project's host.
FIRECRAWL_API_KEY	Convex secret.
ADMIN_REVIEW_TOKEN	Convex secret, at least 32 characters. Exchanged for a session.
DISCOVERY_ENABLED	Set true on Convex to run scheduled search.
AGENTMAIL_API_KEY	Convex secret for receipts.
AGENTMAIL_WEBHOOK_SECRET	Convex secret. Svix secret from AgentMail.
AGENTMAIL_INTAKE_ADDRESS	Public inbox shown on /submit.
AGENTMAIL_INBOX_ID	Optional. AgentMail inbox_id when it is not the intake address.
PUBLIC_SITE_URL	HTTPS origin used in receipt links. Match the live app URL above.
CONVEX_SITE_URL	Set by Convex. Receipts load /brand/mark.png from it.
AGENTMAIL_BASE_URL	Optional. Defaults to https://api.agentmail.to/v0.

Never prefix secrets with VITE_. Only .env.example belongs in Git. Machine-local scratch belongs in .local/ and is ignored.

Webhook path: https://<deployment>.convex.site/agentmail/webhook for message.received. Restrict it to the configured inbox. Forward public announcements only.

pnpm run check
pnpm run build

After confirming the target, deploy backend changes with pnpm exec convex deploy. pnpm run deploy updates Cloudflare Workers only. Use the Sites publishing workflow for chatgpt.site; .openai/hosting.json identifies the existing project. Forks need their own Sites project and Workers account. Event submission uses the chatgpt.site URL, the public GitHub repo, and the root hackathon.md build log.

How I built with Codex

I used Codex to build the React screens and Convex pipeline, then revised the product through screenshots and browser sessions. My feedback drove the mobile layout, simpler navigation, and separate administrator workspace.

Codex helped trace duplicate submissions and empty-feed states, add tests for authorization and offer lifecycle changes, and verify releases on both hosts. I chose the product direction and reviewed the results. See the evidence and dated build log in hackathon.md.

Hackathon and thanks

Built for the All Gas hackathon.

See hackathon.md for the build log and submission checklist. See AGENTS.md for the file map and what is actually wired.

Thank you to Convex, OpenAI, Firecrawl, and AgentMail. Convex, Firecrawl, and AgentMail run in the product. Codex helped build it. There is no OpenAI model API call in the running app.