Category · 5 tools · 3 comparisons
API development tools
Design, build, test and document APIs with developer-focused tools.
At a glance
- Tools tracked
- 5
- Entry plans
- $5–$1,500/mo
- Typical entry plan
- $7.50/mo
- Free plan
- 5 of 5
- Cheapest paid
- Apollo GraphOS, $5/mo
- Best value score
- Yaak, 7/10
Every tool we cover
Price tracker →| Tool | Score | From | Top listed plan | Free plan | Trial | Pages |
|---|---|---|---|---|---|---|
 YaakYaak | 7.3 | $6.58/mo | $12.42/mo | Yes | 30 days | Review |
 Webhook.siteWebhook.site | 7.2 | $7.50/mo | $58.25/mo | Yes | — | ReviewAlternatives |
 HookdeckHookdeck | 7.2 | $39/mo* | $499/mo | Yes | 14 days | ReviewPricingAlternatives |
 Apollo GraphOSApollo GraphOS | 7.0 | $5/mo | $5/mo | Yes | — | ReviewPricingAlternatives |
 DreamFactoryDreamFactory | 6.0 | $1,500/mo* | $6,000/mo | Yes | — | ReviewAlternatives |
* Lower confidence: the vendor's pricing page couldn't be read directly or didn't list every price, so the figure was compiled from other public sources and may be incomplete. Check the vendor's page before you buy.
Head-to-head
Highest scored
YaakYaak
A broad, local-first API client; check the annual bill and unpublished free-plan limits before switching.
Webhook.siteWebhook.site
Strong capture and workflow tools, but free URLs expire and paid plans cap stored history.
HookdeckHookdeck
Strong webhook controls and debugging tools; pricing gets harder to judge once event overages enter.
API development tools: quick answers
How much do API development tools cost?
Paid plans for the 5 API development tools we track start between $5 and $1,500 a month, and the typical entry plan is about $7.50 a month. 5 of them have a free plan. Prices are the vendors' own, checked Nov 6, 2026; most quote the per-month price when billed annually.
Which API development tool is the cheapest?
Apollo GraphOS has the lowest paid entry plan at $5 a month, followed by Yaak at $6.58. If you can live with limits, Yaak, Webhook.site, Hookdeck and Apollo GraphOS have a free plan.
Which API development tools have a free plan?
Yaak, Webhook.site, Hookdeck, Apollo GraphOS and DreamFactory have a free plan. Free plans are usually capped on usage, seats or features; each review lists the limits.
Which API development tool scores highest in our reviews?
Yaak scores highest at 7.3/10. A broad, local-first API client; check the annual bill and unpublished free-plan limits before switching.