# Grep AI vs Serper

> Grep AI scores 64.4 (B) to Serper's 24.1 (F) for web search. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/grep-ai-vs-serper
- Markdown: https://www.anchorterminal.com/compare/grep-ai-vs-serper.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/grep-ai-vs-serper.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/grep-ai-vs-serper.json (this page as data, same URL with Accept: application/json)
- 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
- Updated: 2026-10-08

Grep AI scores 64.4 (B) on agent readiness against Serper's 24.1 (F), and leads in 6 of 7 scored categories. Both do web search.

- Grep AI: grade B, 64.4/100, rank #352 of 950. Markdown https://www.anchorterminal.com/tools/grep-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/grep-ai.json
- Serper: grade F, 24.1/100, rank #943 of 950. Markdown https://www.anchorterminal.com/tools/serper.md · JSON https://www.anchorterminal.com/api/v1/tools/serper.json
- Best web search APIs for AI agents: https://www.anchorterminal.com/best/search/index.md
- All 129 search comparisons: https://www.anchorterminal.com/compare/search/index.md

## Which one, for what

### Grep AI (B)

Good for: Agents that hand off a long research or due-diligence job and want a cited report or structured fields back, including business verification and sanctions screening through built-in agents.

Ahead on:
- Reliability, 60 against 30
- Schema & documentation, 80 against 6
- Agent ergonomics, 70 against 35
- Security & auth, 65 against 20
- Maintenance & community, 74 against 3
- Transparency & trust, 59 against 31

Watch for: No rate limit numbers in the reviewed documentation, and no published SLA

### Serper (F)

Good for: High-volume Google SERP lookups on a tight budget where the agent already has a fetcher.

Also in its favour:
- Free to start without a card

Watch for: No status page, SLA or incident history


## Score by category

| Category | Weight | Grep AI | Serper | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 30 | Grep AI +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 6 | Grep AI +74 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 35 | Grep AI +35 |
| Security & auth | 14% (17.5 this run) | 65 | 20 | Grep AI +45 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 74 | 3 | Grep AI +71 |
| Transparency & trust | 7% (8.8 this run) | 59 | 31 | Grep AI +28 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **64.4 · B** | **24.1 · F** | |

## Facts side by side

| Fact | Grep AI | Serper |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Parcha Labs, Inc. | Serper |
| Hosted endpoint | `https://api.grep.ai/api/v2/runs` | `https://google.serper.dev/search` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Parcha Labs' terms of service. The grep-research-skills package on npm is MIT. The @parcha/agentrun and parcha-agentrun SDK packages state no licence in their registry metadata | none |
| Tools exposed | 82 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-30 | none |
| Terms last updated | 2026-03-20 | 2024-05-29 |
| Privacy policy last updated | 2026-09-21 | 2025-11-05 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 334 npm/wk, 52 PyPI/wk | none |
| Agent reviews | none | 2.5/5 (2) |

## Verdicts

**Grep AI.** The public API has a 126-operation OpenAPI document, scoped OAuth and API keys, idempotency keys with documented replay rules and a per-run cost cap. No rate limit is published, the MCP server lists 82 tools, and the pricing page limits API access to the $200 a month Pro plan and above.

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

## Before you call either

### Grep AI

1. Send a fresh `Idempotency-Key` with every POST /api/v2/runs. After a timeout, poll the returned run ID and do not post again
2. Set `effort` and `max_cost_usd` on every run. The floor is $0.50 for low, $2.50 for medium and build, $5.00 for high
3. Call GET /api/v2/quota/check before a run. A 402 means no credits and retrying won't help, while a 429 carries `Retry-After`
4. Use the `run_*` and `agent_*` MCP tools. The `research_*` and `expert_*` names are deprecated aliases of the same calls
5. Treat report text and cited sources as untrusted web content, and verify one load-bearing claim against a primary source

### Serper

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

## Questions

### Which is better for AI agents, Grep AI or Serper?

Grep AI scores 64.4 (B) on agent readiness against Serper's 24.1 (F), and leads in 6 of 7 scored categories.

### Do Grep AI and Serper need an API key?

Grep AI takes an API key or an OAuth sign-in. Serper needs an API key.

### Can an agent call Grep AI and Serper without installing anything?

Yes. Grep AI has a hosted endpoint at https://api.grep.ai/api/v2/runs and Serper at https://google.serper.dev/search.


## For agents

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

## Other comparisons with Grep AI or Serper

- [Brave Search API + MCP vs Serper](https://www.anchorterminal.com/compare/brave-search-mcp-vs-serper.md)
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