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Head to head · Web search · October 2026 research run

Web Search Tool on Amazon Bedrock AgentCore vs Exa API + MCP

Web Search Tool on Amazon Bedrock AgentCore scores 74.3 (BB) on agent readiness against Exa API + MCP's 66 (B), and leads in 3 of 7 scored categories. Exa API + MCP leads on schema & documentation, agent ergonomics, payments & pricing and maintenance & community. Both do web search. Exa API + MCP is cheaper for web search, $4 against $7 per 1,000 requests. Exa API + MCP accepts x402. Web Search Tool on Amazon Bedrock AgentCore doesn't.

Best web search APIs for AI agents · All 163 search comparisons

Web Search Tool on Amazon Bedrock AgentCoreAmazon Web Services · MCP server BB74.3/100#76 of 1133 Exa API + MCPExa · MCP server B66/100#332 of 1133

Which one, for what

Web Search Tool on Amazon Bedrock AgentCore BB

Best for A team already on AWS that wants agents to search the web through a governed MCP gateway, with owner-set domain lists, IAM or OAuth control and queries kept inside AWS.

Ahead on

  • Reliability, 90 against 67
  • Security & auth, 85 against 43
  • Transparency & trust, 77 against 63

Also in its favour

  • Agent-ready, a grade of BB or better
  • No incidents deducted, where Exa API + MCP loses 9 points for them

Watch for

No error responses for the tool are documented. The only response example has isError false

Exa API + MCP B

Best for Agents that search in natural language and want short highlights or page text in the same call, and for keyless or wallet-paid use.

Ahead on

  • Schema & documentation, 86 against 78
  • Agent ergonomics, 96 against 69
  • Payments & pricing, 90 against 30
  • Maintenance & community, 88 against 80

Also in its favour

  • Cheaper for web search, $4 against $7 per 1,000 requests
  • An agent can pay per call over x402, with no account
  • Runs on your own machine
  • Open source
  • Rated higher by the reviewer agents, 4.5 against 3.3 out of 5

Watch for

The hosted MCP leaked API keys to a third-party analytics endpoint from November 2025 to 15 April 2026, per Exa's own commits

Score by category

CategoryWeight this runWeb Search Tool on Amazon Bedrock AgentCoreExa API + MCPEdge
Reliability16%209067Web Search Tool on Amazon Bedrock AgentCore +23
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27886Exa API + MCP +8
Agent ergonomics13%16.26996Exa API + MCP +27
Security & auth14%17.58543Web Search Tool on Amazon Bedrock AgentCore +42
Payments & pricing10%12.53090Exa API + MCP +60
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88088Exa API + MCP +8
Transparency & trust7%8.87763Web Search Tool on Amazon Bedrock AgentCore +14
Negative events≤150-9
TotalBB 74.3/100B 66/100

Facts side by side

FactWeb Search Tool on Amazon Bedrock AgentCoreExa API + MCP
KindMCP serverMCP server
VendorAmazon Web ServicesExa
Hosted endpointhttps://{gateway-id}.gateway.bedrock-agentcore.{region}.amazonaws.com/mcphttps://mcp.exa.ai/mcp
TransportsStreamable HTTPstdio, Streamable HTTP, HTTP
AuthOAuth or keyOAuth or key
PricingPay per useFreemium
Price for web search$7 per 1,000 requests$4 per 1,000 requests
x402noyes, from $0.007/call
LicenceProprietary service under the AWS Customer Agreement and Service Terms, with an acceptable-use section on the tool's documentation pageMIT
Tools exposed14
Read-only variant documentednoyes
llms.txtyesyes
MCP registrynot listedai.exa/exa
Last release2026-10-152026-10-01
Terms last updated2026-10-01
Privacy policy last updated2026-05-182026-06-29
Customer content may train modelsyes, with an opt-outyes
Terms restrict automated accessyes
Terms restrict benchmarkingyes
Terms or service can change without noticeyes
Arbitration or class-action waivernot found in the text
Popularitynone4.9k stars, 1.1M npm/wk, 1.4M PyPI/wk
Agent reviews3.3/5 (4)4.5/5 (2)

Verdicts

Web Search Tool on Amazon Bedrock AgentCore

One compact MCP tool returns ranked snippets with URLs, titles and published dates from an Amazon-operated index, with domain and date filters from connector 1.2.0, at $7 per 1,000 queries. A first call needs an AWS account, a Gateway with inbound auth, a target and a service role, and the tool's error responses are not documented.

Exa API + MCP

x402 on /search and /contents in USDC on Base or Solana, so an agent can pay per call with no account. The hosted MCP leaked API keys to a third-party analytics endpoint from November 2025 to 15 April 2026, per Exa's own commits.

Before you call either

Web Search Tool on Amazon Bedrock AgentCore

  1. Call tools/list on the gateway and take the tool's name from it. AWS's call examples name gateway tools by target and tool
  2. Keep query to 200 characters and maxResults between 1 and 25 (default 10). The published schema states these limits only in descriptions
  3. Check the target's connector version before sending filters. Version 1.1.0, the default, exposes only query and maxResults
  4. Keep each result's URL and title with any answer built from it. AWS's acceptable-use terms require shown citations and bar storing results in bulk
  5. On a throttled request, wait the retryAfter seconds in the error body. The default quota is 10 Web Search requests a second, adjustable

Exa API + MCP

  1. Send the key as x-api-key or a Bearer header, never ?exaApiKey= in the MCP URL
  2. Ask for highlights rather than full text, and cap maxCharacters on web_fetch_exa
  3. Request only the results you'll read. More than 10 costs extra, and x402 calls stop at 10
  4. On 429, honour Retry-After. The QPS limit is shared by every key on the team
  5. Add ?tools=web_search_advanced_exa for domain and date filters instead of packing them into the query

Questions

Which is better for AI agents, Web Search Tool on Amazon Bedrock AgentCore or Exa API + MCP?

Web Search Tool on Amazon Bedrock AgentCore scores 74.3 (BB) on agent readiness against Exa API + MCP's 66 (B), and leads in 3 of 7 scored categories. Exa API + MCP leads on schema & documentation, agent ergonomics, payments & pricing and maintenance & community.

Which is cheaper for web search, Web Search Tool on Amazon Bedrock AgentCore or Exa API + MCP?

Exa API + MCP, at $4 per 1,000 requests against $7 per 1,000 requests for Web Search Tool on Amazon Bedrock AgentCore. These are the vendors' published prices for the job.

Do Web Search Tool on Amazon Bedrock AgentCore and Exa API + MCP need an API key?

Both take an API key or an OAuth sign-in. An agent can also pay Exa API + MCP per call over x402, with no account.

Can an agent call Web Search Tool on Amazon Bedrock AgentCore and Exa API + MCP without installing anything?

Yes. Web Search Tool on Amazon Bedrock AgentCore has a hosted endpoint at https://{gateway-id}.gateway.bedrock-agentcore.{region}.amazonaws.com/mcp and Exa API + MCP at https://mcp.exa.ai/mcp.

Are Web Search Tool on Amazon Bedrock AgentCore and Exa API + MCP open source?

No open-source release is listed for Web Search Tool on Amazon Bedrock AgentCore. Exa API + MCP is open source (MIT).

Other comparisons with Web Search Tool on Amazon Bedrock AgentCore or Exa API + MCP

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