Best API Clients in 2026
Updated
38 API clients ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
38ranked
1free plans on this page
$10/molowest paid tier
5 Oct 2026last checked
Input list API clients 13 channels on this page · 40 of 104 spec lines stated by the makers
Ch Tool Free planPaid fromGraphQL supportgRPC supportWebSocket supportAutomated test runsAPI documentationTeam workspaces Spec sheet Score
26 Restfox Free plannot statedPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportYesAutomated test runsYesAPI documentationnot statedTeam workspacesnot stated 2/8spec lines stated 6.5
27 curl Free planYesPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportYesAutomated test runsnot statedAPI documentationnot statedTeam workspacesnot stated 2/8spec lines stated 6.4
28 Refit Free planYesPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportnot statedAutomated test runsYesAPI documentationnot statedTeam workspacesnot stated 2/8spec lines stated 6.2
29 Posting Free plannot statedPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportNoAutomated test runsNoAPI documentationnot statedTeam workspacesnot stated 2/8spec lines stated 6.2
30 HTTP Prompt Free plannot statedPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportnot statedAutomated test runsnot statedAPI documentationnot statedTeam workspacesnot stated 0/8spec lines stated 6.2
31 Karve Free planNoPaid fromnot statedGraphQL supportNogRPC supportNoWebSocket supportNoAutomated test runsNoAPI documentationNoTeam workspacesNo 7/8spec lines stated 6.2
32 WhoisJSON API Free planYesPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportnot statedAutomated test runsnot statedAPI documentationYesTeam workspacesnot stated 2/8spec lines stated 6.2
33 NativeRest Free planNoPaid fromnot statedGraphQL supportYesgRPC supportnot statedWebSocket supportnot statedAutomated test runsYesAPI documentationnot statedTeam workspacesYes 4/8spec lines stated 6.1
34 GraphiQL Free planYesPaid fromnot statedGraphQL supportYesgRPC supportnot statedWebSocket supportYesAutomated test runsnot statedAPI documentationnot statedTeam workspacesnot stated 3/8spec lines stated 6.0
35 xh Free planYesPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportnot statedAutomated test runsnot statedAPI documentationnot statedTeam workspacesnot stated 1/8spec lines stated 5.9
36 Restish Free planYesPaid fromnot statedGraphQL supportnot statedgRPC supportnot statedWebSocket supportnot statedAutomated test runsnot statedAPI documentationnot statedTeam workspacesnot stated 1/8spec lines stated 5.9
37 SPARQLWrapper Free planYesPaid fromnot statedGraphQL supportNogRPC supportNoWebSocket supportNoAutomated test runsNoAPI documentationNoTeam workspacesNo 7/8spec lines stated 5.6
38 nasapower Free planYesPaid fromnot statedGraphQL supportNogRPC supportNoWebSocket supportNoAutomated test runsNoAPI documentationNoTeam workspacesNo 7/8spec lines stated 5.5
Compare all 13 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | GraphQL support | gRPC support |
|---|---|---|---|---|---|---|---|---|
| 26 | Restfox | 6.5 | No | — | — | — | — | — |
| 27 | curl | 6.4 | No | — | Yes | — | — | — |
| 28 | Refit | 6.2 | No | — | Yes | — | — | — |
| 29 | Posting | 6.2 | No | — | — | — | — | — |
| 30 | HTTP Prompt | 6.2 | No | — | — | — | — | — |
| 31 | Karve | 6.2 | No | $39.99/mo | No | — | No | No |
| 32 | WhoisJSON API | 6.2 | Free plan | $10/mo | Yes | — | — | — |
| 33 | NativeRest | 6.1 | No | $199/mo | No | — | Yes | — |
| 34 | GraphiQL | 6.0 | No | — | Yes | — | Yes | — |
| 35 | xh | 5.9 | No | — | Yes | — | — | — |
| 36 | Restish | 5.9 | No | — | Yes | — | — | — |
| 37 | SPARQLWrapper | 5.6 | No | — | Yes | — | No | No |
| 38 | nasapower | 5.5 | No | — | Yes | — | No | No |
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