APIVerve Website Readability API

APIVerve Website Readability API scores webpages for developers and teams that want readability checks inside software or automated workflows. Its flexible access options are useful, but each call draws 10 credits from a shared pool, and commercial use starts at $29.99 a month.

Overview

The service accepts webpage input through an HTTPS POST request to /v1/websitereadability. Requests use an API key in the x-api-key header; one key works across APIVerve’s 300+ APIs. Each readability call costs 10 credits, so the monthly allowance is shared with other APIs on the account. That arrangement suits teams already using APIVerve, while making the effective readability quota depend on their overall API use.

Responses support JSON, XML, YAML, CSV, GraphQL, and MCP access. A live request tool on the product page can be tried without an API key, and an interactive form can be embedded on a website without placing keys in its markup. These options give the service several ways into a workflow, though the analysis itself takes webpages as input.

Key features

The API provides eight readability scores and grade-level analysis. It also supports multiple export options and bulk search up to 200. Teams can connect through VerveKit for MCP agent access or VerveSheets formulas for Google Sheets and Excel. Zapier, Make, Power Automate, Pipedream, n8n, ViaSocket, and Postman are also named, alongside SDKs for Node.js, Python, and .NET. This is a broad set of routes for a focused endpoint; projects that need domain variations will need another approach, since none are supported.

APIVerve lists the API as online with a 99.9% uptime SLA and typical p50 latency of 1798 ms. It states that traffic uses TLS 1.2 or higher, stored data uses AES-256, and API keys are hashed. Request and response content is processed in real time rather than retained, while usage logs are kept for 90 days. The stated latency is worth weighing for workflows where response time matters.

Pricing

The free plan costs free and includes 200 credits per month, a 5-request-per-minute limit, community support, and required attribution. Its non-commercial-use restriction makes it suitable for evaluation or personal projects, not commercial deployment. At 10 credits per call, the allowance covers up to 20 readability requests per month if used only for this API.

Starter costs $29.99 a month, billed monthly. It includes 200,000 credits per month, 60 requests per minute, a commercial license, Zapier, Make and MCP access, and email support. It is the entry point for commercial use and should cover regular use of this endpoint, provided other APIs do not consume the shared credits.

Pro costs $99.99 a month, billed monthly. Its 1,000,000 monthly credits and 180 requests per minute support heavier usage, while three team members, five scoped sub-keys, and ten embedded forms add room for a small team to manage separate access and site integrations. Mega costs $299.99 a month, billed monthly. It raises the allowance to 4,000,000 credits and includes ten team members, 25 scoped sub-keys, dedicated servers, 90-day audit history, and priority support. Mega fits larger deployments that need those operational provisions; its price is difficult to justify for occasional scoring.

Platforms

The API is available on web and through API access. Its integrations and SDKs make it accessible from several developer and automation environments, while the zero-code form offers a route for site owners who do not want to build a direct API connection.

Who it's for

This is a strong fit for developers and teams that need repeatable webpage scoring, grade-level analysis, and a choice of API, spreadsheet, agent, or automation integrations. It is less suitable for commercial users with light or occasional needs, since the free tier prohibits commercial use and the paid plans begin at $29.99 a month. It also does not fit workflows that require arbitrary text input or domain variations.

Pros and cons

• Pros: Six response options, eight readability scores, and grade-level analysis give developers useful flexibility for structured workflows.
• Pros: The live request tool and embeddable form provide ways to try or use the service without first building a direct API integration.
• Pros: A shared key across 300+ APIs and a wide range of named integrations can simplify use within an existing APIVerve setup.
• Cons: Each call costs 10 shared credits, so activity on other APIVerve APIs reduces the balance available for readability checks.
• Cons: The free plan is limited to 200 monthly credits, 5 requests per minute, non-commercial use, and required attribution.
• Cons: Webpage-only input and no domain variations limit its usefulness for text-first or domain-comparison workflows.

Alternatives

ToolsVale Readability Checker is a free option across Android, iOS, Linux, macOS, web, and Windows for readers who prefer broad device coverage over an API plan. Readability offers a free, MIT-licensed GitHub Action, CLI, and Docker image for Linux, macOS, and Windows, making it a better fit for teams that want those tools without a paid plan. Eclipse Readability Studio is free and open source for Linux, macOS, and Windows. Readability Formulas offers free online readability tools and a Readability Scoring System, with extension, macOS, web, and Windows availability.

textstat is a free MIT-licensed Python package for Linux and self-hosted use, suited to developers who want a package rather than a hosted API. A2Z Tools Plain Language Analyzer is a free English-only web tool. PageRefine is a free web tool with no signup. ProfText offers a free API and web plan with unlimited analyses, a 5,000-character limit per analysis, 30 clarity rules, and AI-generated text detection; it may suit users who need those checks alongside readability.

Browse AI Readability Checkers for more options.

Verdict

Choose APIVerve Website Readability API if you need webpage scoring in an API-driven workflow and value its response formats, integrations, and shared access to APIVerve’s broader catalog. Its main drawback is the combination of a small, non-commercial free tier and paid plans starting at $29.99 a month. For occasional checks, a free alternative is the more practical choice; for commercial automation at scale, Starter is the clearest entry point.