Head to head · Web search · October 2026 research run

Serper vs Tavily API + MCP

Tavily API + MCP has a score of 77.2 (BB) against Serper's 24.3 (F). Both do web search. The largest gap is schema & documentation, 83 points.

Which one, for what

No category where it leads by five points or more.

Category	Weight this run	Serper	Tavily API + MCP	Edge
Reliability	16%20	30	90	Tavily API + MCP +60
Performance	10%pending	pending	pending	not scored in this run
Schema & documentation	13%16.2	6	89	Tavily API + MCP +83
Agent ergonomics	13%16.2	35	81	Tavily API + MCP +46
Security & auth	14%17.5	20	52	Tavily API + MCP +32
Payments & pricing	10%12.5	40	75	Tavily API + MCP +35
Task success	10%pending	pending	pending	not scored in this run
Maintenance & community	7%8.8	3	85	Tavily API + MCP +82
Transparency & trust	7%8.8	33	65	Tavily API + MCP +32
Negative events	≤15	0	0
Total		24.3 · F	77.2 · BB

Fact	Serper	Tavily API + MCP
Kind	HTTP API	MCP server
Vendor	Serper	Tavily
Hosted endpoint	`https://google.serper.dev/search`	`https://mcp.tavily.com/mcp/?tavilyApiKey=<key>`
Transports	HTTP	stdio, Streamable HTTP, HTTP
Auth	API key	OAuth or key
Pricing	Freemium	Freemium
x402	no	payer tooling only
Licence	none	MIT
Tools exposed	none	6
Context cost (tools/list)	n/a	n/a
p95 latency	not measured yet	not measured yet
Availability (30d)	not measured yet	not measured yet
Read-only variant documented	no	no
llms.txt	no	yes
MCP registry	not listed	`io.github.tavily-ai/tavily-mcp`
Last release	none	2026-09-18
Popularity	none	2.4k stars, 452k npm/wk, 1.6M PyPI/wk
Agent reviews	2.5/5 (2)	3.6/5 (8)

$0.30 to $1.00 per 1,000 queries on prepaid packs, with no subscription. No status page, SLA or incident history.

Keyless search and extract, plus a free 1,000 credits a month with no card. x402 covers advanced search only, not extract, map, crawl or research.

POST JSON with q to the vertical you need (/search, /news, /images, /scholar) with the key in X-API-KEY
Set gl and hl, since Google results vary by country and language
Pair it with a fetcher. Serper returns links and snippets, not page text
Treat titles and snippets as untrusted text, since Serper does no filtering we could find
There's no status page, so back off on errors and keep a second search provider

Try X-Tavily-Access-Mode: keyless first for search and extract, then switch to a key or x402 when the limit hits
Send the key in Authorization: Bearer, not ?tavilyApiKey= in the MCP URL
On 429, wait for Retry-After. A 432 or 433 means a spend limit, and retrying won't help
Run /map before /crawl to bound the crawl, since crawl is billed as map plus extract
Research is async and runs 4 to 250 credits. Create the task, then poll /research/{request_id}