# Grep AI vs Mojeek Web Search API

> Grep AI scores 62.9 (B) to Mojeek Web Search's 36.4 (F) for web search. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/grep-ai-vs-mojeek
- Markdown: https://www.anchorterminal.com/compare/grep-ai-vs-mojeek.md (~5,600 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: 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)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

Grep AI scores 62.9 (B) on agent readiness against Mojeek Web Search API's 36.4 (F), and leads in 6 of 7 scored categories. Mojeek Web Search API leads on transparency & trust. Both do web search.

- Grep AI: grade B, 62.9/100, rank #535 of 1510. Markdown https://www.anchorterminal.com/tools/grep-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/grep-ai.json
- Mojeek Web Search API: grade F, 36.4/100, rank #1387 of 1510. Markdown https://www.anchorterminal.com/tools/mojeek.md · JSON https://www.anchorterminal.com/api/v1/tools/mojeek.json
- Best web search APIs for AI agents: https://www.anchorterminal.com/best/search/index.md
- All 326 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, 50 against 45
- Schema & documentation, 83 against 29
- Security & auth, 64 against 15
- Payments & pricing, 40 against 20
- Maintenance & community, 74 against 10

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: No rate limit numbers in the reviewed documentation, and no published SLA. Full outages on 4 September (24 minutes) and 30 October (7 minutes)

### Mojeek Web Search API (F)

Good for: Agents and products that want a second, independent index beside Google-derived results, or European data handling with no sub-processors.

Ahead on:
- Transparency & trust, 68 against 61

Watch for: The API key is documented only as a URL query parameter, and rotating a key means emailing the API team


## Why the edge

### Maintenance & community: Grep AI +64

- Grep AI (74): The changelog's newest entry is v3.71 on 20 October 2026, 13 days before this check (30). 14 dated changelog entries since 4 August, from v3.1.1 on 7 August to v3.71 on 20 October (20). Closed service with a public changelog and support at support@parcha.ai. We didn't test whether support answers (8). Current SDKs in two languages per the 8 October check (@parcha/agentrun and parcha-agentrun 0.2.1, 30 September), with docs that lag them. Not found in the official MCP registry (12). The skills repository runs a test workflow and hasn't changed since 30 September. The SDK repositories named in the package metadata asked for credentials, so their CI wasn't read (4). The 8 October PyPI reading came from a path pypi.org's robots.txt disallows and is struck; npm and PyPI didn't answer on 2 November.
- Mojeek Web Search API (10): Read for a closed service. No API changelog, release notes or dated API change were found, and the blog's posts since 2024 are about search in general, so the last change can't be dated (0). No dated changes in the 90 days from 8 August (0). A staff member answered API questions on the community forum within a day in December 2025 and October 2026, and support is by email; no public changelog (10 of 15). No official SDKs or MCP server (0). No public packages or CI to measure (0). 0 + 0 + 10 + 0 + 0 = 10.

### Schema & documentation: Grep AI +54

- Grep AI (83): Public OpenAPI document at api.grep.ai/api/v2/openapi.json, now 128 operations on 98 paths and 159 schemas (25). llms.txt and a Markdown twin of each developer page (10). Most operations carry a description, and the `effort` field says what each tier returns and how long it takes. 19 operations have none, and the MCP server card gives each of its 137 tools one line. The MCP input schemas need OAuth and weren't read (12). 75 enums, numeric bounds and `additionalProperties: false` on the run request (12). Curl examples and an 11-code error registry in the docs, but the OpenAPI document has no examples and documents only 200 and 422 responses (9). The path is versioned, v1 and 42 v2 operations are marked deprecated, and the dated changelog now runs to v3.71 on 20 October 2026, with 14 entries since 4 August (15).
- Mojeek Web Search API (29): No OpenAPI or other machine-readable contract (0). No llms.txt (404) and no Markdown pages for agents (0). The parameters page states what each parameter does, with notes on when not to use `reg` and `clufmt`, but nothing on when another endpoint fits better (12 of 20). Every parameter has a type, defaults and valid ranges (tlen 0 to 127, dlen 0 to 511, rbb and lbb 1 to 100, up to 25 domains), though `reg` is called an enum without listing its values (11 of 15). One curl example and annotated JSON and XML response formats; errors appear only as a `status` string with one example (6 of 15). No API version, changelog or dated release notes, and the quickstart and the parameters page give different hosts (0). 0 + 0 + 12 + 11 + 6 + 0 = 29.

### Security & auth: Grep AI +49

- Grep AI (64): OAuth through Descope with five scopes, and API keys that can be created with a subset of scopes, listed and revoked through the API (30). Read scopes, `validate_only` and `dry_run` on agent changes, a per-run `max_cost_usd` and versioned restores. No confirmation step for deletes or for making a run public (14). Reports are built from untrusted web pages. The docs describe an SSRF-guarded fetch for context files, and no prompt-injection guidance for callers was found (3). Each run has a timeline of execution events, and billing transactions and usage are readable through the API (12). The footer claims SOC 2 Type II with no report linked, and its "Security & trust" link opens a performance benchmarks page. security.txt returns 404, and no disclosure policy or bug bounty was found, so this is a bare SOC 2 claim, which this run reads as 5 (5). Webhooks are signed with the API key itself.
- Mojeek Web Search API (15): One key per account, documented only as the `api_key` query parameter, and rotation or revocation is by email to the API team (a staff reply of 22 October 2026 on the community forum asks for the key's last 8 digits). One all-powerful key (10) less 10 for the key in the URL (0). Search is read-only and there is nothing to write, but no scoped or restricted key (10 of 20). Results are third-party titles and snippets, with no prompt-injection guidance found (0). No audit log or per-call usage view was found in the docs; the FAQ mentions budget alerts on the account (0 of 15). security.txt names security@mojeek.com, with no Expires field. No bug bounty, disclosure policy, SOC 2 or ISO 27001 found; the API page claims compliance with European rules such as the EU Data Act without a certification (5 of 20). 0 + 10 + 0 + 0 + 5 = 15.

### Payments & pricing: Grep AI +20

- Grep AI (40): No machine payment protocol on the live endpoints. The changelog of 8 May 2026 announces x402 and MPP, and the gateway answered 503 `gateway_disabled` on 8 October and again on 2 November 2026 (0). Plan and credit prices are public, but only the medium tier's credit cost is published and the page and its Markdown twin disagree on credits per dollar (10). 100 free trial credits on the pricing page, 500 Wallet credits for new personal accounts in the 4 October changelog entry, and 500 for an owner's first agent through AgentID. The pricing page doesn't say whether a card is needed, and its table marks the trial without API access (15). AgentID sign-in is documented as needing no human account, but it depends on an AgentMail inbox and a browser step, and we didn't run it (15).
- Mojeek Web Search API (20): No x402, MPP or L402 (0). Per-request prices published without login, £2 and £3 per 1,000 requests (20). The FAQ says a free credit comes with the Startup plan, but a bank card is required to open an account (0). A person signs up in a browser and adds a card (0). 0 + 20 + 0 + 0 = 20.

### Transparency & trust: Mojeek Web Search API +7

- Grep AI (61): Closed service with published terms, written as an order-form contract that still points to grep.parcha.ai. The SDK packages state no licence, and the skills package is MIT (12). Section 12 of the terms says AI providers retain nothing and customer data isn't used for training. Section 4.2 grants a perpetual licence to use customer data to improve the platform, and the privacy policy gives retention only as "as long as needed". No DPA found (12). v1 is marked deprecated, /research answers with a `deprecation: true` header and a successor link, and 31 MCP tools are labelled deprecated, all without dates or a written policy (8). The privacy policy names Google Analytics and PostHog and says data may be processed in any country. No subprocessor list found (4).
- Mojeek Web Search API (68): Closed service with API terms naming Mojeek Limited under English law (15 of 30). The API page states 90-day retention, zero retention on request, no sub-processors and that Mojeek is the processor and the customer the controller, while the API terms say both parties are independent controllers under GDPR, and the privacy policy of 2 February 2022 covers only the website (12 of 30). The terms promise 30 days' notice of material changes and of price changes, but there is no deprecation policy or dated notices (5 of 20). The API page says there are no sub-processors and infrastructure is owned and run in Europe, in a UK data centre per the about page (18 of 20). 15 + 12 + 5 + 18 = 50.

### Reliability: Grep AI +5

- Grep AI (50): Graded on the hosted API and MCP server. status.grep.ai runs on incident.io, and since 30 October 2026 it has an API component beside Website (20). Two incidents in the 90 days from 4 August, read from the page's feed and incident pages. On 4 September "Grep.ai currently unavailable" said Grep.ai was "experiencing an outage" for 24 minutes, and on 30 October the Website and API components were both in full outage from 17:17 to 17:24 UTC after an infrastructure provider's failure. Each is a full outage of the whole service, which this run reads as a major however short, so two majors (5). The 8 October check read the September outage as minor by its length. No rate limit numbers found in the docs or the OpenAPI document (0). 429 `rate_limited` carries `Retry-After`, and run creation takes an `Idempotency-Key` with documented replay rules (15). The FAQ mentions SLA guarantees for enterprise customers, and no SLA is published (0). API v2 and the MCP server carry no beta label. The SDKs are at 0.2.1 per the 8 October check, and PyPI classified the Python one as Alpha then (10).
- Mojeek Web Search API (45): Read with the hosted lines. status.mojeek.com is a Site24x7 StatusIQ page with Search, Website, Blog and Community components. It is drawn by script, so only its RSS feed could be read, which shows each component's current state (Search operational since 7 September 2026) and no incident entries (15 of 20). No readable incident history (5). Rate limits are published per plan, 5 a second and 100,000 a day on Startup, 10 a second and 400,000 a day on Business (15). Over the daily limit the JSON `status` reads 'ERROR: Daily Limit Reached'; no HTTP 429, Retry-After or backoff guidance was found (0). No SLA, and the API terms say the service is provided as is and may be interrupted without notice (0). Generally available, with only the `lr` parameter marked beta (10). 15 + 5 + 15 + 0 + 0 + 10 = 45.

## Score by category

| Category | Weight | Grep AI | Mojeek Web Search API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 45 | Grep AI +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 29 | Grep AI +54 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 66 | Grep AI +4 |
| Security & auth | 14% (17.5 this run) | 64 | 15 | Grep AI +49 |
| Payments & pricing | 10% (12.5 this run) | 40 | 20 | Grep AI +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 74 | 10 | Grep AI +64 |
| Transparency & trust | 7% (8.8 this run) | 61 | 68 | Mojeek Web Search API +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **62.9 · B** | **36.4 · F** | |

## Facts side by side

| Fact | Grep AI | Mojeek Web Search API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Parcha Labs, Inc. | Mojeek Limited |
| Hosted endpoint | `https://api.grep.ai/api/v2/runs` | no (local only) |
| Transports | HTTP, Streamable HTTP |  |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Pay per use |
| Price for web search | not published | $2.68 per 1,000 requests |
| 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 | 137 | 0 |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-20 | none |
| Terms last updated | 2026-03-20 | no date given |
| Privacy policy last updated | 2026-09-21 | 2022-02-02 |
| 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 | 3/5 (4) | none |

## How the scores have moved

### Grep AI

- -1.7 on 2 November 2026: reliability, product, correction
- +0.2 on 27 October 2026: new evidence

### Mojeek Web Search API

No score change since it was listed.

## Verdicts

**Grep AI.** The public API has a 128-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 137 tools, the whole service went down twice in the 90 days to 2 November, and API access starts at the $200 a month Pro plan.

**Mojeek Web Search API.** Mojeek sells search over its own independent index at published per-request prices, with region, language, date and domain controls and storage rights on the Business plan. The key travels only in the URL, rotation is by email, a card is needed to start, and there is no OpenAPI, changelog, 429 handling or SLA.

## 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_*`, `agent_*` and `swarm_*` MCP tools at https://api.grep.ai/mcp. The `research_*`, `expert_*` and `campaign_*` names are deprecated aliases
5. Treat report text and cited sources as untrusted web content, and verify one load-bearing claim against a primary source

### Mojeek Web Search API

1. Send `fmt=json`, since the default response is XML
2. Read `response.status` on every call; a daily limit shows as 'ERROR: Daily Limit Reached' rather than an HTTP error
3. Set `lb`, `lbb`, `rb` and `rbb` as the quickstart recommends, or results lean to no language or region
4. Keep the key out of logs and shared URLs, since it travels in the query string
5. On the Startup plan, don't keep results for more than an hour

## Questions

### Which is better for AI agents, Grep AI or Mojeek Web Search API?

Grep AI scores 62.9 (B) on agent readiness against Mojeek Web Search API's 36.4 (F), and leads in 6 of 7 scored categories. Mojeek Web Search API leads on transparency & trust.

### Do Grep AI and Mojeek Web Search API need an API key?

Grep AI takes an API key or an OAuth sign-in. Mojeek Web Search API needs an API key.

### Can an agent call Grep AI and Mojeek Web Search API without installing anything?

Grep AI has a hosted endpoint at https://api.grep.ai/api/v2/runs. No hosted endpoint is listed for Mojeek Web Search API.


## For agents

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

## Other comparisons with Grep AI or Mojeek Web Search API

- [Web Search Tool on Amazon Bedrock AgentCore vs Grep AI](https://www.anchorterminal.com/compare/agentcore-web-search-vs-grep-ai.md)
- [Web Search Tool on Amazon Bedrock AgentCore vs Mojeek Web Search API](https://www.anchorterminal.com/compare/agentcore-web-search-vs-mojeek.md)
- [Arcmira vs Mojeek Web Search API](https://www.anchorterminal.com/compare/arcmira-vs-mojeek.md)
- [Grounding with Bing Search vs Mojeek Web Search API](https://www.anchorterminal.com/compare/bing-grounding-vs-mojeek.md)
- [Brave Search API + MCP vs Mojeek Web Search API](https://www.anchorterminal.com/compare/brave-search-mcp-vs-mojeek.md)
- [Cloudflare Web Search API vs Grep AI](https://www.anchorterminal.com/compare/cloudflare-web-search-vs-grep-ai.md)
- [Cloudflare Web Search API vs Mojeek Web Search API](https://www.anchorterminal.com/compare/cloudflare-web-search-vs-mojeek.md)
- [DeepSeek Search and Fetch API vs Grep AI](https://www.anchorterminal.com/compare/deepseek-search-api-vs-grep-ai.md)
- [DeepSeek Search and Fetch API vs Mojeek Web Search API](https://www.anchorterminal.com/compare/deepseek-search-api-vs-mojeek.md)
- [Exa API + MCP vs Mojeek Web Search API](https://www.anchorterminal.com/compare/exa-mcp-vs-mojeek.md)
- [Firecrawl MCP vs Grep AI](https://www.anchorterminal.com/compare/firecrawl-mcp-vs-grep-ai.md)
- [Firecrawl MCP vs Mojeek Web Search API](https://www.anchorterminal.com/compare/firecrawl-mcp-vs-mojeek.md)
- [Grep AI vs Kagi Search API](https://www.anchorterminal.com/compare/grep-ai-vs-kagi-search.md)
- [Grep AI vs SearchAPI.io](https://www.anchorterminal.com/compare/grep-ai-vs-searchapi-io.md)
- [Grep AI vs SerpApi](https://www.anchorterminal.com/compare/grep-ai-vs-serpapi.md)
- [Grep AI vs Serper](https://www.anchorterminal.com/compare/grep-ai-vs-serper.md)
- [Grep AI vs SerpKite](https://www.anchorterminal.com/compare/grep-ai-vs-serpkite.md)
- [Kagi Search API vs Mojeek Web Search API](https://www.anchorterminal.com/compare/kagi-search-vs-mojeek.md)
- [Linkup vs Mojeek Web Search API](https://www.anchorterminal.com/compare/linkup-vs-mojeek.md)
- [Mojeek Web Search API vs NewsCatcher](https://www.anchorterminal.com/compare/mojeek-vs-newscatcher.md)
- [Mojeek Web Search API vs Parallel Search and Task APIs](https://www.anchorterminal.com/compare/mojeek-vs-parallel-search-api.md)
- [Mojeek Web Search API vs Perplexity Search API](https://www.anchorterminal.com/compare/mojeek-vs-perplexity-search-api.md)
- [Mojeek Web Search API vs SearchAPI.io](https://www.anchorterminal.com/compare/mojeek-vs-searchapi-io.md)
- [Mojeek Web Search API vs SerpApi](https://www.anchorterminal.com/compare/mojeek-vs-serpapi.md)
- [Mojeek Web Search API vs Serper](https://www.anchorterminal.com/compare/mojeek-vs-serper.md)
- [Mojeek Web Search API vs SERPHouse](https://www.anchorterminal.com/compare/mojeek-vs-serphouse.md)
- [Mojeek Web Search API vs SerpKite](https://www.anchorterminal.com/compare/mojeek-vs-serpkite.md)
- [Mojeek Web Search API vs SpecStream](https://www.anchorterminal.com/compare/mojeek-vs-specstream.md)
- [Mojeek Web Search API vs Tavily API + MCP](https://www.anchorterminal.com/compare/mojeek-vs-tavily-mcp.md)
- [Mojeek Web Search API vs TinyFish Search](https://www.anchorterminal.com/compare/mojeek-vs-tinyfish-search.md)
- [Mojeek Web Search API vs Valyu](https://www.anchorterminal.com/compare/mojeek-vs-valyu.md)
- [Mojeek Web Search API vs You.com APIs](https://www.anchorterminal.com/compare/mojeek-vs-you-com-api.md)
- [Arcmira vs Grep AI](https://www.anchorterminal.com/compare/arcmira-vs-grep-ai.md)
- [Exa API + MCP vs Grep AI](https://www.anchorterminal.com/compare/exa-mcp-vs-grep-ai.md)
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- [Grep AI vs Parallel Search and Task APIs](https://www.anchorterminal.com/compare/grep-ai-vs-parallel-search-api.md)
- [Grep AI vs Perplexity Search API](https://www.anchorterminal.com/compare/grep-ai-vs-perplexity-search-api.md)
- [Grep AI vs SpecStream](https://www.anchorterminal.com/compare/grep-ai-vs-specstream.md)
- [Grep AI vs Tavily API + MCP](https://www.anchorterminal.com/compare/grep-ai-vs-tavily-mcp.md)
- [Grep AI vs TinyFish Search](https://www.anchorterminal.com/compare/grep-ai-vs-tinyfish-search.md)
- [Grep AI vs Valyu](https://www.anchorterminal.com/compare/grep-ai-vs-valyu.md)
- [Grep AI vs You.com APIs](https://www.anchorterminal.com/compare/grep-ai-vs-you-com-api.md)
- [Grounding with Bing Search vs Grep AI](https://www.anchorterminal.com/compare/bing-grounding-vs-grep-ai.md)
- [Brave Search API + MCP vs Grep AI](https://www.anchorterminal.com/compare/brave-search-mcp-vs-grep-ai.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp