Skillforge Render API

Screenshots, PDFs, and Open Graph images, over HTTP or MCP. Prepaid credits, no subscription.

Live today: free trial API keys (100 units, one key per IP per day), the render endpoints (/v1/screenshot, /v1/pdf, /v1/og, and the matching MCP tools), the MCP tools/list/initialize handshake, and paid top-ups (/v1/topup returns a real Stripe checkout link; credits land on your key automatically after payment).

What it does

One API, three render kinds: a screenshot of a URL or raw HTML, a PDF of a URL or raw HTML, or an Open Graph image from HTML you send. Credits are prepaid; you buy a pack once and draw it down per render. No monthly plan, no seat count, no expiring subscription to cancel.

Free trial

Create a key with no signup and no card. Each key starts with 100 units. Limited to one key per IP address per day.

curl -X POST https://render.skillforge99.com/v1/keys

Response:

{"apiKey":"sfr_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}

Save that key. It is shown once and is the only credential the API uses; there is no separate account or password.

Endpoints

Every render endpoint takes Authorization: Bearer <your key>. Each call returns two headers on success: x-render-units (units this call cost) and x-credit-remaining (units left on the key).

Screenshot

POST /v1/screenshot · 1 unit, or 2 units with fullPage: true

curl -X POST https://render.skillforge99.com/v1/screenshot \
  -H "Authorization: Bearer sfr_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com","width":1280,"height":800,"format":"png"}' \
  --output screenshot.png

Give it url or html (not both). Optional: width (320-1920), height (240-1080), fullPage (boolean), format (png, jpeg, or webp).

PDF

POST /v1/pdf · 2 units

curl -X POST https://render.skillforge99.com/v1/pdf \
  -H "Authorization: Bearer sfr_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com"}' \
  --output page.pdf

Give it url or html (not both). Optional: width, height.

Open Graph image

POST /v1/og · 1 unit

curl -X POST https://render.skillforge99.com/v1/og \
  -H "Authorization: Bearer sfr_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"html":"<div style=\"font-size:64px\">Hello Skillforge</div>","width":1200,"height":630}' \
  --output og.png

Takes html only (no url), capped at 100KB. Optional: width, height.

All three reject private and internal targets (localhost, 127.0.0.1, RFC1918 ranges, link-local, .internal/.local hosts) with 400 bad_url. Only http and https URLs are accepted.

Connect over MCP

The same three renders are exposed as MCP tools (screenshot_url, render_pdf, render_og) at a single streamable-HTTP endpoint. tools/list, initialize, and tools/call all work today; tools/call bills and renders through the same pipeline as the HTTP endpoints above.

curl -X POST https://render.skillforge99.com/mcp \
  -H "Authorization: Bearer sfr_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

MCP client config:

{
  "mcpServers": {
    "skillforge-render": {
      "url": "https://render.skillforge99.com/mcp",
      "headers": {
        "Authorization": "Bearer sfr_YOUR_KEY"
      }
    }
  }
}

Pricing

Every render is 1 unit, except a PDF or a full-page screenshot, which are 2 units. Buy a pack once, draw it down, buy another when it runs out.

Pack	Price	Units
Starter	$10	4,000
Builder	$25	11,000
Scale	$50	24,000

Render	Cost
Screenshot (viewport)	1 unit
Screenshot (`fullPage: true`)	2 units
PDF	2 units
Open Graph image	1 unit

Buying credits

POST /v1/topup with a pack name (p10, p25, or p50) starts a checkout and returns a URL to pay:

curl -X POST https://render.skillforge99.com/v1/topup \
  -H "Authorization: Bearer sfr_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"pack":"p25"}'

Open the returned URL to pay. Credits land on your key automatically after payment, no further request needed.

Rate limits

60 requests per minute per key, on top of the credit balance itself. A request over the limit gets 429 rate_limited and does not spend a unit.

FAQ

What happens if a render fails?

You are not charged. If a render throws after a unit was debited, the unit is credited back automatically and the response is a 502 render_failed, not a silent charge.

What about a disputed card charge?

If you dispute a charge, we refund it automatically and disable the key it was used with. We don't fight chargebacks.

Is there a subscription?

No. Packs are one-time purchases. Credits do not expire on a billing cycle because there is no billing cycle.

What do you store?

Nothing beyond short-lived logs (kept up to 24 hours for abuse detection, then deleted). The URLs, HTML, and rendered images or PDFs you send or receive are not retained after the response is returned; there is no dashboard of your past renders because we do not keep the content to show one.

Do you resolve hostnames before checking for private IPs?

We block the obvious private and loopback ranges by hostname and literal IP. We do not resolve DNS before that check, so a public hostname that itself points at a private IP is not blocked at this layer (requests still leave from Cloudflare's network, not ours).

What is a "unit"?

The currency your prepaid balance is measured in. A screenshot or Open Graph image is 1 unit; a PDF or a full-page screenshot is 2 units, because those cost more compute to render.

Can an AI agent pay per call without an API key?

Yes. Agent buyers can pay per call in USDC via x402, no account or API key needed: $0.005 for a screenshot or OG image, $0.01 for a PDF, settled on Base through Coinbase's facilitator.