API Website

An API website is the public site where a provider documents its endpoints, publishes prices, and issues keys. The best one for developers is the one whose docs you can read quickly, whose sandbox answers a real request before you pay, and whose endpoints an AI agent can call through MCP tools. APIbase is an MCP gateway that gives your agent tools for developers across a large and growing set of providers.

What a developer should check on an API website

A developer should judge an API website by four things: the documentation, the sandbox, the pricing page, and the status history. Each one answers a different risk. The documentation shows what the API does. The sandbox shows whether the API handles your request. The pricing page shows what your expected volume costs. The status history shows how the provider behaves when something fails.

Score each site on the same four items before you commit. A site with thin documentation and no sandbox costs more time later, even when its headline price looks low.

Start with the documentation

The documentation should list every endpoint, its parameters, and a sample response. Read the error section before the happy path. Errors show rate limits and retry rules that the happy path hides, and those rules decide how your integration behaves under load.

Check these items on the docs page:

• An endpoint list with methods and paths
• The authentication method and where the key goes in each request
• Rate limits stated per plan, not only in a footnote
• A changelog with dated entries and clear notes on breaking changes

If a site hides its parameter list behind a login, treat that as a cost. You will spend time finding answers that a public reference would give in seconds.

Test before you pay

A sandbox or free tier lets you send a real request and read a real response. Run one read call and one write call with data that matches your own shape. Those two calls reveal more about the API than a long reading session does.

Note whether the sandbox asks for a card before the first call. Some sites require payment details before any test, and that requirement belongs in your evaluation notes next to the price.

Keep the first test small. Save the response, compare its fields with the docs, and check whether the error response matches the error section you read earlier.

Compare pricing by unit cost, not by the headline

Pricing pages often show a monthly fee first and the per-call cost later. Calculate the cost of your expected volume before you compare sites. Divide the monthly fee by the included calls, then add any overage rate for calls above the included amount.

APIbase publishes plans from 0 USD to 29.99 USD. Check the pricing page for the current plan details before you budget, because plan contents change.

When a site lists no per-call rate, write that down as a gap. Do not assume the rate is zero.

Look for MCP support when an agent calls the API

If an AI agent calls the API, the site should describe its MCP tools. An MCP tool gives the agent a typed name, a parameter schema, and a result it can read. Without that, the agent must guess request formats from prose documentation, and wrong guesses cost retries and tokens.

APIbase is an MCP gateway. It gives your agent MCP tools for developers, so the agent calls a named tool instead of building each HTTP request by hand. Connect through the connect page to see how the setup works.

Check the tool descriptions too. A good description states what the tool does, which inputs it needs, and what it returns.

Check the status history and the changelog

A status page with a dated incident history shows how the provider handles failures. Look for incident entries that name the cause and the fix. A page with no past incidents gives you less information than a page with clear, resolved incidents.

The changelog shows whether your integration will break on its own. Look for dated entries, deprecation notices with a removal date, and a clear marker for breaking changes. A site that removes fields without notice creates work for every team that depends on it.

Apply the same checklist to every site

Use this order each time you evaluate an API website:

1. Read the error section and the rate limits in the documentation.
2. Run one read call and one write call in the sandbox or free tier.
3. Calculate the unit cost at your expected volume.
4. Confirm that the agent-facing tools, if any, describe their inputs and outputs.
5. Review the status history and the changelog for dated breaking changes.

Record each answer next to the site name. A written record makes the comparison fair when you revisit it later.

What this guide does not cover

This guide gives criteria. It does not name or rank other API websites. Apply the same criteria to any site, including APIbase.

Prices, plan limits, and features change over time. The pricing page, the documentation, and the changelog are the source of truth. Treat any figure on this page as a starting point for your own check.

Live pricing — developer

Connect via MCP

$ curl -X POST https://apibase.pro/api/v1/tools/account.timeseries/call \
  -H "Content-Type: application/json" -d '{"params": {}}'

FAQ

What makes an API website good for developers?

A good API website has complete documentation with parameters and error details, a sandbox or free tier that returns real responses, transparent pricing with a per-call rate, a status history with dated incidents, and a changelog that flags breaking changes. Those four items show whether the API will work, what it costs at your volume, and how it behaves when something goes wrong.

Should I test an API before paying for it?

Yes. Run one read call and one write call with data that matches your own shape. Compare the response with the documentation, and check whether the error response matches the error section. A sandbox or free tier makes this test possible without a commitment.

Does APIbase give an AI agent MCP tools?

APIbase is an MCP gateway. It gives your agent MCP tools for developers across a large and growing set of providers, so the agent calls named tools instead of building each HTTP request. The connect page at the connect page explains the setup.

How do I compare API prices fairly?

Compare the unit cost at your expected volume, not the headline monthly fee. Divide the monthly fee by the included calls, then add any overage rate. If a site shows no per-call rate, record that gap instead of assuming the rate is zero.

Where can I find current APIbase prices?

APIbase publishes plans from 0 USD to 29.99 USD. The pricing page holds the current plan details, and those details change over time, so check it before you budget.

Recommended next step

1. STEP 1/2 Connect your MCP client
2. STEP 2/2 Browse the full catalog

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Published: 2026-10-29Source: live apibase.pro catalog snapshot