Screenshot API comparison: which one should you use in 2026?
Pricing, features, speed, and agent support — compared honestly.
There are a lot of screenshot APIs on the market. Most of them do roughly the same thing — take a URL, render it in headless Chromium, return an image. The differences are in pricing, developer experience, feature depth, and increasingly, whether they support autonomous agent access.
Here's an honest comparison of the options available in 2026, including where nightglass fits in.
What they all have in common
Every serious screenshot API uses Chromium under the hood. They all support PNG and JPEG output, custom viewport sizes, full-page capture, and basic wait/delay options. If that's all you need, any of them will work. The differences are at the edges.
Pricing models
This is where the biggest divergence happens. Most screenshot APIs use subscription tiers — $29/mo for 1,000 screenshots, $99/mo for 10,000, etc. The problem with tiers is that you either overpay (buying capacity you don't use) or hit limits at the worst possible time.
The alternative is pay-as-you-go — you pay per screenshot with no monthly commitment. This is how nightglass works: $0.005 per capture, billed against a prepaid balance. No subscription, no monthly minimum.
For low-to-medium volume (under 10,000/month), PAYG is almost always cheaper. For high volume, subscription tiers start making sense — but you need to accurately predict your usage, which is harder than it sounds.
Agent access
This is the big differentiator heading into 2026–2027. As AI agents become a meaningful consumer of APIs, the question is: can an agent use your API without a human provisioning access?
Most screenshot APIs require an API key, which requires a human signup. nightglass supports x402 agent payments — an agent can call the API without any credentials, pay per-request with USDC on Base, and get the result. No signup, no API key, no human in the loop.
This matters because the next wave of API consumers isn't human developers — it's autonomous software. The APIs that make themselves accessible to agents (via x402, agents.txt, and llms.txt) will capture demand that traditional APIs can't reach.
Feature comparison
| Feature | Most APIs | nightglass |
|---|---|---|
| PNG/JPEG output | Yes | Yes |
| Custom viewport | Yes | Yes |
| Full-page capture | Yes | Yes |
| Device emulation | Some | Yes (via DPR + viewport) |
| Dark mode emulation | Rare | Yes |
| Browser mockup frame | Rare | Yes (style: mockup) |
| x402 agent payments | No | Yes (default path) |
| agents.txt / llms.txt | No | Yes |
| Pay-as-you-go pricing | Some | Yes (only model) |
Which one should you pick?
If you're a human developer building a product that needs screenshots (link previews, monitoring, PDF generation), any of the established APIs will work. Choose based on pricing model and whether you prefer PAYG or subscription. If you need mockup mode or dark mode emulation, check that those are supported.
If you're building AI agents that need to consume APIs autonomously, you need an API that supports agent-native payment. Right now, nightglass is the only screenshot API with x402 support. That will change as the protocol gets adopted — but early adopters get the benefit of being discoverable in agents.txt and llms.txt directories today. For a deeper look at how x402 works, see the x402 protocol explainer.
If you're building a platform that connects agents to tools (like OpenClaw's ClawHub), supporting x402-enabled APIs means your agents can access more tools without per-API credential management. See the rise of agentic commerce for the bigger picture.
New to screenshot APIs generally? Start with what is a screenshot API for the foundational overview, or the pricing model comparison if cost is the main decision factor.