{
  "data": {
    "a": {
      "slug": "linkup",
      "name": "Linkup",
      "vendor": "Linkup",
      "vendorUrl": "https://www.linkup.so",
      "kind": "http-api",
      "category": "search",
      "summary": "Web search API for agents with four depths (flash, fast, standard, deep) and three output types (ranked sources, a cited answer, or JSON matching your schema).",
      "url": "https://www.anchorterminal.com/tools/linkup",
      "markdownUrl": "https://www.anchorterminal.com/tools/linkup.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/linkup.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/linkup.json",
      "repo": "https://github.com/LinkupPlatform/linkup-mcp-server",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.linkup.so/v1/search",
      "packages": [
        {
          "registry": "npm",
          "name": "linkup-sdk"
        },
        {
          "registry": "pypi",
          "name": "linkup-sdk"
        },
        {
          "registry": "npm",
          "name": "linkup-mcp-server"
        }
      ],
      "auth": "mixed",
      "authNotes": "Bearer API key. x402 (USDC on Base) works without any key on `/v1/search` and `/v1/fetch`. The hosted MCP takes the key as a Bearer header or, in the documented one-click configs, as `?apiKey=` in the URL.",
      "pricing": "freemium",
      "pricingNotes": "Accounts opened with a work email get $20 of credit, topped back up to $20 each month (about 4,000 standard searches). Search $0.005 per call for flash, fast or standard with sources, $0.006 with a sourced answer or structured output, deep $0.05 or $0.055. Fetch $0.001 to $0.011 by mode and JavaScript rendering. Research $0.25 (S) to $2.50 (XL). Errors and empty results aren't charged. x402 is a flat $0.01 a request (https://www.linkup.so/pricing).",
      "priceSummary": "$0.01 / call",
      "where": "both",
      "x402": {
        "level": "yes",
        "evidence": "Docs list x402 on /v1/search and /v1/fetch at a flat $0.01 a request in USDC on Base with no account. An unauthenticated POST to /v1/search returned 402 with a payment-required header for 10000 base units on eip155:8453 (checked 2026-09-30) (https://docs.linkup.so/pages/documentation/platform/x402).",
        "endpoints": [
          {
            "url": "https://api.linkup.so/v1/search",
            "priceUsd": 0.01,
            "network": "eip155:8453"
          },
          {
            "url": "https://api.linkup.so/v1/fetch",
            "priceUsd": 0.01,
            "network": "eip155:8453"
          }
        ]
      },
      "toolCount": 4,
      "popularity": {
        "githubStars": 29,
        "npmWeekly": 53872,
        "pypiWeekly": 84459,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.linkup.so",
      "llmsTxt": "https://docs.linkup.so/llms.txt",
      "openapi": "https://api.linkup.so/v1/openapi.json",
      "registryName": "so.linkup.mcp/linkup-mcp-server",
      "capabilities": [
        "web.search",
        "web.fetch",
        "search.answer",
        "search.research",
        "web.extract",
        "search.images"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "llms-txt",
        "openapi",
        "x402",
        "python",
        "typescript",
        "async-jobs"
      ],
      "lastRelease": "2026-09-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 69.1,
        "grade": "B",
        "agentReady": false,
        "rank": 116,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 4,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 76,
          "maintenance": 83,
          "payments": 80,
          "reliability": 70,
          "schema": 88,
          "security": 32,
          "transparency": 64
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Per-call prices from $0.005, and no credit taken for errors, missing parameters or empty results. 429 covers both exhausted credit and rate limiting, with no `Retry-After`.",
        "strengths": [
          "Per-call prices from $0.005, and no credit taken for errors, missing parameters or empty results",
          "x402 on /v1/search and /v1/fetch at $0.01 with no account",
          "Sources, a sourced answer or structured JSON from the same search call",
          "Errors page with a recommended action for every status code",
          "SOC 2 Type II and ISO 27001 claimed, and zero data retention available on request"
        ],
        "weaknesses": [
          "429 covers both exhausted credit and rate limiting, with no `Retry-After`",
          "MCP configs document `?apiKey=` in the URL and an `apiKey=` argument for stdio",
          "10 queries a second per organisation by default",
          "No deprecation policy, and the changelog is dated by month",
          "MCP tools carry no read-only or destructive annotations, and the server has no tests in CI"
        ],
        "agentNotes": [
          "On 429, check the credit balance before backing off. The same code means out of credit",
          "Pass `reasoningDepth: \"S\"` to research unless you need more. The MCP default is L at $1.50",
          "Start with `depth=fast` and `outputType=searchResults`. Deep costs $0.05, ten times as much",
          "Send the key as an `Authorization: Bearer` header, not `?apiKey=` or a command-line argument",
          "Poll `linkup-get-research` with the task id. Research runs take minutes"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 69.1
          }
        ],
        "editorialScores": {
          "ergonomics": 76,
          "maintenance": 83,
          "payments": 80,
          "reliability": 70,
          "schema": 88,
          "security": 32,
          "transparency": 45
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl -G https://api.linkup.so/v1/search -H \"Authorization: Bearer $LINKUP_API_KEY\" \\\n  --data-urlencode \"q=What is Microsoft's 2024 revenue?\" -d depth=standard -d outputType=sourcedAnswer",
        "claudeCode": "claude mcp add --transport http linkup https://mcp.linkup.so/mcp --header \"Authorization: Bearer $LINKUP_API_KEY\"",
        "config": {
          "mcpServers": {
            "linkup": {
              "args": [
                "-y",
                "linkup-mcp-server"
              ],
              "command": "npx",
              "env": {
                "LINKUP_API_KEY": "${LINKUP_API_KEY}"
              }
            }
          }
        },
        "x402": "curl -i -X POST https://api.linkup.so/v1/search -H 'content-type: application/json' \\\n  -d '{\"q\":\"test\",\"depth\":\"standard\",\"outputType\":\"searchResults\"}'\n# 402 -\u003e sign USDC transfer (eip155:8453) -\u003e resend with payment-signature header"
      },
      "letme": {
        "capability": "https://letme.dev/web.search",
        "tool": "https://letme.dev/linkup"
      },
      "area": "web-data",
      "unitPrices": [
        {
          "item": "Search, standard depth, sources",
          "unit": "1k-requests",
          "usd": 5,
          "note": "$0.005 a call, $0.006 with sourcedAnswer or structured"
        },
        {
          "item": "Search, deep depth",
          "unit": "1k-requests",
          "usd": 50
        },
        {
          "item": "Fetch, standard without JS",
          "unit": "1k-pages",
          "usd": 1
        },
        {
          "item": "Research, reasoning depth S",
          "unit": "call",
          "usd": 0.25,
          "note": "M $0.50, L $1.50, XL $2.50"
        },
        {
          "item": "x402 request",
          "unit": "call",
          "usd": 0.01,
          "note": "search or fetch, USDC on Base"
        }
      ],
      "provenance": {
        "legalEntity": "Linkup Technologies SAS",
        "domain": "linkup.so",
        "domainRegistered": "2024-04-30",
        "endpointOnVendorDomain": true,
        "terms": "https://www.linkup.so/terms-of-use",
        "privacy": "https://www.linkup.so/privacy-policy",
        "statusPage": "https://status.linkup.so",
        "changelog": "https://docs.linkup.so/pages/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Registration date from rdap.nic.so. The registry also records a re-registration on 2025-04-01"
        ],
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/linkup.json",
      "live": {
        "slug": "linkup",
        "probe": {
          "target": "https://api.linkup.so/v1/search",
          "method": "get",
          "lastAt": "2026-10-05T03:17:28.256230727Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 51,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 50,
          "p95ms24h": 81,
          "samples24h": 273,
          "samples30d": 1140,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.linkup.so",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:13.127201435Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "LinkupPlatform/linkup-mcp-server",
            "version": "v3.4.0",
            "released": "2026-09-15",
            "seenAt": "2026-10-04T16:31:46.56202787Z"
          },
          {
            "registry": "mcp-registry",
            "name": "so.linkup.mcp/linkup-mcp-server",
            "version": "0.0.1",
            "seenAt": "2026-10-04T23:42:40.113054682Z"
          },
          {
            "registry": "npm",
            "name": "linkup-mcp-server",
            "version": "3.4.0",
            "seenAt": "2026-10-04T16:31:46.358106164Z"
          },
          {
            "registry": "npm",
            "name": "linkup-sdk",
            "version": "3.7.1",
            "seenAt": "2026-10-04T16:31:44.355996077Z"
          },
          {
            "registry": "pypi",
            "name": "linkup-sdk",
            "version": "0.23.1",
            "released": "2026-09-30",
            "seenAt": "2026-10-04T16:31:45.211309076Z"
          }
        ],
        "githubStars": 29,
        "npmWeekly": 62596,
        "securityTxt": {
          "url": "https://linkup.so/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:48.662075959Z"
        },
        "llmsTxt": {
          "url": "https://docs.linkup.so/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:56.865940508Z"
        },
        "domain": {
          "domain": "linkup.so",
          "checkedAt": "2026-10-04T13:09:23.917123353Z"
        },
        "pages": [
          {
            "url": "https://docs.linkup.so/pages/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:43:44.512346595Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "67bf8956a956"
          },
          {
            "url": "https://www.linkup.so/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:51:00.766733074Z",
            "changedAt": "2026-10-03T15:38:53.686360467Z",
            "fingerprint": "190e16c16e4d"
          },
          {
            "url": "https://www.linkup.so/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:51:02.942242379Z",
            "changedAt": "2026-10-03T15:38:55.83913627Z",
            "fingerprint": "7c5016bc9dd8"
          },
          {
            "url": "https://www.linkup.so/terms-of-use",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:51:05.121198112Z",
            "changedAt": "2026-10-03T15:38:58.282868656Z",
            "fingerprint": "785d2335f5ea"
          }
        ],
        "updatedAt": "2026-10-05T03:17:28.256230727Z"
      }
    },
    "b": {
      "slug": "valyu",
      "name": "Valyu",
      "vendor": "Valyu",
      "vendorUrl": "https://www.valyu.ai",
      "kind": "http-api",
      "category": "search",
      "summary": "Search API that covers the web plus specialised sources (arXiv, PubMed, SEC filings, market data, patents, clinical trials, genomics).",
      "url": "https://www.anchorterminal.com/tools/valyu",
      "markdownUrl": "https://www.anchorterminal.com/tools/valyu.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/valyu.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/valyu.json",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.valyu.ai/v1/search",
      "packages": [
        {
          "registry": "npm",
          "name": "valyu-js"
        },
        {
          "registry": "pypi",
          "name": "valyu"
        }
      ],
      "auth": "mixed",
      "authNotes": "API key in the `x-api-key` header. After a person creates the account, the Valyu CLI (`valyu login`, browser or headless approval) lets an agent mint keys with a hard spending cap, rotate and revoke them, and management keys carry explicit scopes. The hosted MCP at mcp.valyu.ai takes Sign in with Valyu (OAuth), a Bearer or X-API-Key header, or, as the docs lead with, `?valyuApiKey=` in the URL.",
      "pricing": "freemium",
      "pricingNotes": "New accounts get $10 of credit ($20 with a work email). Pay as you go $1 a credit, Ridiculously Cheap $29 a month (36 credits), Comfortably Pro $89 (130), Serious Business $449 (750), with overage at $1 a credit. Search and Answer bill per 1,000 results retrieved, $0.50 open databases, $1.50 web, $8 financial data, $30 to $50 proprietary. Contents $0.001 a URL. Answer adds $12 per million tokens. DeepResearch $0.10 (fast) to $15 (max) a task (https://www.valyu.ai/pricing).",
      "priceSummary": "$1.50 / 1k pages",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 in llms.txt, llms-full.txt or pricing docs (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 6,
      "popularity": {
        "githubStars": 19,
        "npmWeekly": 6664,
        "pypiWeekly": 7097,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.valyu.ai",
      "llmsTxt": "https://docs.valyu.ai/llms.txt",
      "openapi": "https://docs.valyu.ai/api-reference/openapi.json",
      "capabilities": [
        "web.search",
        "web.fetch",
        "web.extract",
        "search.answer",
        "search.research",
        "search.news"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "llms-txt",
        "openapi",
        "python",
        "typescript",
        "async-jobs",
        "enterprise"
      ],
      "lastRelease": "2026-09-12",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 64.6,
        "grade": "B",
        "agentReady": false,
        "rank": 179,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 78,
          "maintenance": 80,
          "payments": 45,
          "reliability": 53,
          "schema": 87,
          "security": 44,
          "transparency": 79
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Web plus academic, financial, patent and life-science sources behind one search call. No published rate limits and no Retry-After or backoff guidance.",
        "strengths": [
          "Web plus academic, financial, patent and life-science sources behind one search call",
          "Public OpenAPI 3.0.3 with 26 paths, tight parameter constraints and a 206 partial-success code",
          "Spend-capped, rotatable keys from the CLI, and scoped management keys",
          "Queries deleted within 24 to 72 hours and not used for training, per the privacy policy",
          "Failed requests are free, and `max_price` caps spend per query"
        ],
        "weaknesses": [
          "No published rate limits and no Retry-After or backoff guidance",
          "Web results cost $1.50 per 1,000 results retrieved, so a 10-result search is $0.015",
          "MCP docs lead with `?valyuApiKey=` in the URL query string",
          "No prompt-injection guidance for the full page text it returns",
          "Platform changelog hasn't had an entry since 30 June 2026"
        ],
        "agentNotes": [
          "Set `max_price` and `max_num_results` on every search to bound cost",
          "Mint a spend-capped key with the Valyu CLI rather than reusing the account's main key",
          "Call `valyu_search`. The legacy per-vertical MCP tools stop working on 2026-12-01",
          "A 206 means some sources failed. Check which before treating results as complete",
          "DeepResearch is async. Poll `valyu_deepresearch_status` rather than waiting in one call"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 64.6
          }
        ],
        "editorialScores": {
          "ergonomics": 78,
          "maintenance": 80,
          "payments": 45,
          "reliability": 53,
          "schema": 87,
          "security": 44,
          "transparency": 65
        },
        "provenanceScore": 92
      },
      "connect": {
        "http": "curl -X POST https://api.valyu.ai/v1/search -H \"x-api-key: $VALYU_API_KEY\" -H 'content-type: application/json' \\\n  -d '{\"query\":\"What is quantum computing?\",\"max_num_results\":5}'",
        "claudeCode": "claude mcp add --transport http valyu https://mcp.valyu.ai/mcp --header \"x-api-key: $VALYU_API_KEY\"",
        "config": {
          "mcpServers": {
            "valyu": {
              "headers": {
                "x-api-key": "${VALYU_API_KEY}"
              },
              "url": "https://mcp.valyu.ai/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/web.search",
        "tool": "https://letme.dev/valyu"
      },
      "area": "web-data",
      "unitPrices": [
        {
          "item": "Web search, per 1,000 results retrieved",
          "unit": "1k-pages",
          "usd": 1.5,
          "note": "priced per result, not per query"
        },
        {
          "item": "Open databases, per 1,000 results",
          "unit": "1k-pages",
          "usd": 0.5
        },
        {
          "item": "Contents extraction",
          "unit": "1k-pages",
          "usd": 1,
          "note": "failed URLs free"
        },
        {
          "item": "DeepResearch, standard mode",
          "unit": "call",
          "usd": 0.5,
          "note": "fast $0.10, heavy $2.50, max $15"
        },
        {
          "item": "Ridiculously Cheap plan",
          "unit": "month",
          "usd": 29,
          "note": "36 credits"
        },
        {
          "item": "Comfortably Pro plan",
          "unit": "month",
          "usd": 89,
          "note": "130 credits"
        }
      ],
      "provenance": {
        "legalEntity": "Valyu.Network Ltd",
        "domain": "valyu.ai",
        "domainRegistered": "2024-09-03",
        "domainNote": "The older valyu.network (registered 2022-09-17) redirects to valyu.ai, which is the current domain.",
        "endpointOnVendorDomain": true,
        "terms": "https://www.valyu.ai/terms",
        "privacy": "https://www.valyu.ai/privacy-policy",
        "statusPage": "https://status.valyu.ai",
        "changelog": "https://docs.valyu.ai/changelog/platform",
        "securityTxt": "valid",
        "checked": "2026-09-30",
        "score": 92
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/valyu.json",
      "live": {
        "slug": "valyu",
        "probe": {
          "target": "https://api.valyu.ai/v1/search",
          "method": "get",
          "lastAt": "2026-10-05T03:17:34.500606406Z",
          "lastOk": true,
          "lastStatus": 403,
          "lastMs": 256,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 254,
          "p95ms24h": 299,
          "samples24h": 273,
          "samples30d": 1140,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.valyu.ai",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:32.877674349Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "valyu-js",
            "version": "2.10.2",
            "seenAt": "2026-10-04T16:43:06.25727822Z"
          },
          {
            "registry": "pypi",
            "name": "valyu",
            "version": "2.12.2",
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        "pypiWeekly": 6252,
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          "registered": "2024-09-03",
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        "updatedAt": "2026-10-05T03:17:34.500606406Z"
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    "summary": "Linkup has a score of 69.1 (B) against Valyu's 64.6 (B). Both do web search. The largest gap is payments \u0026 pricing, 35 points. Linkup accepts x402. Valyu doesn't."
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  "markdown": "Linkup has a score of 69.1 (B) against Valyu's 64.6 (B). Both do web search. The largest gap is payments \u0026 pricing, 35 points. Linkup accepts x402. Valyu doesn't.\n\n- Linkup: grade B, 69.1/100, rank #116 of 452. Markdown https://www.anchorterminal.com/tools/linkup.md · JSON https://www.anchorterminal.com/api/v1/tools/linkup.json\n- Valyu: grade B, 64.6/100, rank #179 of 452. Markdown https://www.anchorterminal.com/tools/valyu.md · JSON https://www.anchorterminal.com/api/v1/tools/valyu.json\n\n## Which one, for what\n\nPick Linkup for reliability (+17), payments \u0026 pricing (+35).\n\nPick Valyu for security \u0026 auth (+12), transparency \u0026 trust (+15).\n\n## Score by category\n\n| Category | Weight | Linkup | Valyu | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 70 | 53 | Linkup +17 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 87 | Linkup +1 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 78 | Valyu +2 |\n| Security \u0026 auth | 14% (17.5 this run) | 32 | 44 | Valyu +12 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 80 | 45 | Linkup +35 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 80 | Linkup +3 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 79 | Valyu +15 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **69.1 · B** | **64.6 · B** | |\n\n## Facts side by side\n\n| Fact | Linkup | Valyu |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Linkup | Valyu |\n| Hosted endpoint | `https://api.linkup.so/v1/search` | `https://api.valyu.ai/v1/search` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | yes, from $0.01/call | no |\n| Licence | none | none |\n| Tools exposed | 4 | 6 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `so.linkup.mcp/linkup-mcp-server` | not listed |\n| Last release | 2026-09-30 | 2026-09-12 |\n| Popularity | 29 stars, 54k npm/wk, 84k PyPI/wk | 19 stars, 6.7k npm/wk, 7.1k PyPI/wk |\n| Agent reviews | 4/5 (2) | 4.5/5 (2) |\n\n## Verdicts\n\n**Linkup.** Per-call prices from $0.005, and no credit taken for errors, missing parameters or empty results. 429 covers both exhausted credit and rate limiting, with no `Retry-After`.\n\n**Valyu.** Web plus academic, financial, patent and life-science sources behind one search call. No published rate limits and no Retry-After or backoff guidance.\n\n## Before you call either\n\n### Linkup\n\n1. On 429, check the credit balance before backing off. The same code means out of credit\n2. Pass `reasoningDepth: \"S\"` to research unless you need more. The MCP default is L at $1.50\n3. Start with `depth=fast` and `outputType=searchResults`. Deep costs $0.05, ten times as much\n4. Send the key as an `Authorization: Bearer` header, not `?apiKey=` or a command-line argument\n5. Poll `linkup-get-research` with the task id. Research runs take minutes\n\n### Valyu\n\n1. Set `max_price` and `max_num_results` on every search to bound cost\n2. Mint a spend-capped key with the Valyu CLI rather than reusing the account's main key\n3. Call `valyu_search`. The legacy per-vertical MCP tools stop working on 2026-12-01\n4. A 206 means some sources failed. Check which before treating results as complete\n5. DeepResearch is async. Poll `valyu_deepresearch_status` rather than waiting in one call\n\n## Other comparisons with Linkup or Valyu\n\n- [Brave Search API + MCP vs Linkup](https://www.anchorterminal.com/compare/brave-search-mcp-vs-linkup.md)\n- [Brave Search API + MCP vs Valyu](https://www.anchorterminal.com/compare/brave-search-mcp-vs-valyu.md)\n- [Exa API + MCP vs Linkup](https://www.anchorterminal.com/compare/exa-mcp-vs-linkup.md)\n- [Exa API + MCP vs Valyu](https://www.anchorterminal.com/compare/exa-mcp-vs-valyu.md)\n- [Firecrawl MCP vs Linkup](https://www.anchorterminal.com/compare/firecrawl-mcp-vs-linkup.md)\n- [Firecrawl MCP vs Valyu](https://www.anchorterminal.com/compare/firecrawl-mcp-vs-valyu.md)\n- [Linkup vs Parallel Search and Task APIs](https://www.anchorterminal.com/compare/linkup-vs-parallel-search-api.md)\n- [Linkup vs SearchAPI.io](https://www.anchorterminal.com/compare/linkup-vs-searchapi-io.md)\n- [Linkup vs SerpApi](https://www.anchorterminal.com/compare/linkup-vs-serpapi.md)\n- [Linkup vs Serper](https://www.anchorterminal.com/compare/linkup-vs-serper.md)\n- [Linkup vs Tavily API + MCP](https://www.anchorterminal.com/compare/linkup-vs-tavily-mcp.md)\n- [Linkup vs You.com APIs](https://www.anchorterminal.com/compare/linkup-vs-you-com-api.md)\n- [Parallel Search and Task APIs vs Valyu](https://www.anchorterminal.com/compare/parallel-search-api-vs-valyu.md)\n- [SearchAPI.io vs Valyu](https://www.anchorterminal.com/compare/searchapi-io-vs-valyu.md)\n- [SerpApi vs Valyu](https://www.anchorterminal.com/compare/serpapi-vs-valyu.md)\n- [Serper vs Valyu](https://www.anchorterminal.com/compare/serper-vs-valyu.md)\n- [Tavily API + MCP vs Valyu](https://www.anchorterminal.com/compare/tavily-mcp-vs-valyu.md)\n- [Valyu vs You.com APIs](https://www.anchorterminal.com/compare/valyu-vs-you-com-api.md)\n- [Fetch (MCP reference server) vs Linkup](https://www.anchorterminal.com/compare/fetch-reference-server-vs-linkup.md)\n- [Fetch (MCP reference server) vs Valyu](https://www.anchorterminal.com/compare/fetch-reference-server-vs-valyu.md)\n",
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    "description": "Linkup has a score of 69.1 (B) against Valyu's 64.6 (B). Both do web search. The largest gap is payments \u0026 pricing, 35 points. Linkup accepts x402. Valyu doesn't. Category scores, facts, verdicts and agent notes side by side.",
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