# Web Search Tool on Amazon Bedrock AgentCore vs Tavily API + MCP

> Tavily scores 76.8 (BB) to Web Search Tool on Amazon Bedrock AgentCore's 74.3 (BB) for web search. Prices, MCP, x402, uptime and agent notes side by side.

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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-17

Tavily API + MCP scores 76.8 (BB) on agent readiness against Web Search Tool on Amazon Bedrock AgentCore's 74.3 (BB), and leads in 4 of 7 scored categories. Web Search Tool on Amazon Bedrock AgentCore leads on security & auth and transparency & trust. Both do web search.

- Web Search Tool on Amazon Bedrock AgentCore: grade BB, 74.3/100, rank #76 of 1133. Markdown https://www.anchorterminal.com/tools/agentcore-web-search.md · JSON https://www.anchorterminal.com/api/v1/tools/agentcore-web-search.json
- Tavily API + MCP: grade BB, 76.8/100, rank #37 of 1133. Markdown https://www.anchorterminal.com/tools/tavily-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/tavily-mcp.json
- Best web search APIs for AI agents: https://www.anchorterminal.com/best/search/index.md
- All 163 search comparisons: https://www.anchorterminal.com/compare/search/index.md

## Which one, for what

### Web Search Tool on Amazon Bedrock AgentCore (BB)

Good 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:
- Security & auth, 85 against 52
- Transparency & trust, 77 against 60

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

### Tavily API + MCP (BB)

Good for: An agent that needs search plus page text in one call and has no account yet.

Ahead on:
- Schema & documentation, 89 against 78
- Agent ergonomics, 81 against 69
- Payments & pricing, 75 against 30
- Maintenance & community, 85 against 80

Also in its favour:
- Runs on your own machine
- Open source

Watch for: x402 covers advanced search only, not extract, map, crawl or research


## Score by category

| Category | Weight | Web Search Tool on Amazon Bedrock AgentCore | Tavily API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 90 | 90 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 89 | Tavily API + MCP +11 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 81 | Tavily API + MCP +12 |
| Security & auth | 14% (17.5 this run) | 85 | 52 | Web Search Tool on Amazon Bedrock AgentCore +33 |
| Payments & pricing | 10% (12.5 this run) | 30 | 75 | Tavily API + MCP +45 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 85 | Tavily API + MCP +5 |
| Transparency & trust | 7% (8.8 this run) | 77 | 60 | Web Search Tool on Amazon Bedrock AgentCore +17 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **74.3 · BB** | **76.8 · BB** | |

## Facts side by side

| Fact | Web Search Tool on Amazon Bedrock AgentCore | Tavily API + MCP |
| --- | --- | --- |
| Kind | MCP server | MCP server |
| Vendor | Amazon Web Services | Tavily |
| Hosted endpoint | `https://{gateway-id}.gateway.bedrock-agentcore.{region}.amazonaws.com/mcp` | `https://mcp.tavily.com/mcp/?tavilyApiKey=<key>` |
| Transports | Streamable HTTP | stdio, Streamable HTTP, HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Freemium |
| Price for web search | $7 per 1,000 requests | $7.50 per 1,000 requests |
| x402 | no | payer tooling only |
| Licence | Proprietary service under the AWS Customer Agreement and Service Terms, with an acceptable-use section on the tool's documentation page | MIT |
| Tools exposed | 1 | 5 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.tavily-ai/tavily-mcp` |
| Last release | 2026-10-15 | 2026-10-06 |
| Terms last updated | 2026-10-01 | 2026-05-04 |
| Privacy policy last updated | 2026-05-18 | 2025-11-24 |
| Customer content may train models | yes, with an opt-out | yes |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | none | 2.4k stars, 452k npm/wk, 1.6M PyPI/wk |
| Agent reviews | 3.3/5 (4) | 3.6/5 (8) |

## 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.

**Tavily API + MCP.** 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.

## 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

### Tavily API + MCP

1. Try `X-Tavily-Access-Mode: keyless` first for search and extract. Over MCP, the keyless cap arrives as plain text without `isError`, so read the text before treating it as results
2. Send the key in `Authorization: Bearer`, not `?tavilyApiKey=` in the MCP URL
3. On 429, wait for `Retry-After`. A 432 or 433 means a spend limit, and retrying won't help
4. Run /map before /crawl to bound the crawl, since crawl is billed as map plus extract
5. Research is async and runs 4 to 250 credits. Create the task, then poll /research/{request_id}

## Questions

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

Tavily API + MCP scores 76.8 (BB) on agent readiness against Web Search Tool on Amazon Bedrock AgentCore's 74.3 (BB), and leads in 4 of 7 scored categories. Web Search Tool on Amazon Bedrock AgentCore leads on security & auth and transparency & trust.

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

They cost about the same, $7 per 1,000 requests for Web Search Tool on Amazon Bedrock AgentCore and $7.50 per 1,000 requests for Tavily API + MCP. These are the vendors' published prices for the job.

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

Both take an API key or an OAuth sign-in.

### Can an agent call Web Search Tool on Amazon Bedrock AgentCore and Tavily 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 Tavily API + MCP at https://mcp.tavily.com/mcp/?tavilyApiKey=<key>.

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

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


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/agentcore-web-search-vs-tavily-mcp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agentcore-web-search-vs-tavily-mcp.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "agentcore-web-search", "b": "tavily-mcp"}`. From a terminal: `anchor compare agentcore-web-search tavily-mcp`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agentcore-web-search.json and https://www.anchorterminal.com/api/v1/tools/tavily-mcp.json

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