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, 8/10
Every tool we cover
API pricing →| Tool | Score | From | Top listed plan | Free plan | Trial | Pages |
|---|---|---|---|---|---|---|
 YaakYaak | 7.6 | $6.58/mo | $12.42/mo | Yes | 30 days | Review |
 HookdeckHookdeck | 7.4 | $39/mo* | $499/mo | Yes | 14 days | ReviewPricingAlternatives |
 Webhook.siteWebhook.site | 7.2 | $7.50/mo | $58.25/mo | Yes | — | ReviewAlternatives |
 Apollo GraphOSApollo GraphOS | 7.2 | $5/mo | $5/mo | Yes | — | ReviewPricingAlternatives |
 DreamFactoryDreamFactory | 7.0 | $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 capable local API client for teams that want Git workflows and agent access without hosted workspace sync.
HookdeckHookdeck
A practical webhook gateway for teams that need routing, queues, replay and delivery visibility.
Webhook.siteWebhook.site
A low-friction hosted webhook inspector with useful workflows and a free tier capped at 50 requests.
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 10, 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, Hookdeck, Webhook.site and Apollo GraphOS have a free plan.
Which API development tools have a free plan?
Yaak, Hookdeck, Webhook.site, 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 7.6/10. A capable local API client for teams that want Git workflows and agent access without hosted workspace sync.