{"workflow":{"id":13911,"name":"Scrape and ingest web content into Supabase pgvector with Firecrawl","views":349,"recentViews":5,"totalViews":349,"createdAt":"2026-03-06T10:33:29.467Z","description":"**What this does**\n\nReceives a URL via webhook, uses Firecrawl to scrape the page into clean markdown, and stores it as vector embeddings in Supabase pgvector. A visual, self-hosted ingestion pipeline for RAG knowledge bases. Adding a new source is as simple as sending a URL.\n\nThe second part of the workflow exposes a chat interface where an AI Agent queries the stored knowledge base to answer questions, with Cohere reranking for better retrieval quality.\n\n**How it works**\n\nPart 1: Ingestion Pipeline\n\n1. Webhook receives a POST request with a `url` field\n2. Verify URL validates and normalizes the domain\n3. Supabase checks if the URL was already ingested (deduplication)\n4. If the URL already exists, ingestion is skipped; otherwise it continues\n5. Firecrawl fetches the page and converts it to clean markdown\n6. OpenAI generates vector embeddings from the scraped content\n7. Default Data Loader attaches the source URL as metadata\n8. Supabase Vector Store inserts the content and embeddings into pgvector\n9. Respond to Webhook confirms how many items were added\n\nPart 2: RAG Chat Agent\n\n1. Chat trigger receives a user question\n2. AI Agent (OpenRouter) queries the Supabase vector store filtered by URL\n3. Cohere Reranker improves retrieval quality before the agent responds\n4. Agent answers based solely on the ingested knowledge base\n\n**Requirements**\n\n- Firecrawl API key\n- OpenAI API key (for embeddings)\n- OpenRouter API key (for the chat agent)\n- Cohere API key (for reranking)\n- Supabase project with pgvector enabled\n\n**Setup**\n\n1. Create a Supabase project and run the following SQL in the SQL editor:\n\n```sql\n-- Enable the pgvector extension\ncreate extension vector\nwith\n  schema extensions;\n\n-- Create a table to store documents\ncreate table documents (\n  id bigserial primary key,\n  content text,\n  metadata jsonb,\n  embedding extensions.vector(1536)\n);\n\n-- Create a function to search for documents\ncreate function match_documents (\n  query_embedding extensions.vector(1536),\n  match_count int default null,\n  filter jsonb default '{}'\n) returns table (\n  id bigint,\n  content text,\n  metadata jsonb,\n  similarity float\n)\nlanguage plpgsql\nas $$\n#variable_conflict use_column\nbegin\n  return query\n  select\n    id,\n    content,\n    metadata,\n    1 - (documents.embedding <=> query_embedding) as similarity\n  from documents\n  where metadata @> filter\n  order by documents.embedding <=> query_embedding\n  limit match_count;\nend;\n$$;\n```\n\n2. Add your Firecrawl API key as a credential in n8n\n3. Add your OpenAI API key as a credential (for embeddings)\n4. Add your OpenRouter API key as a credential (for the chat agent)\n5. Add your Cohere API key as a credential (for reranking)\n6. Activate the workflow\n\n**How to use**\n\nSend a POST request to the webhook URL:\n\n```bash\ncurl -X POST https://your-n8n-instance/webhook/your-id \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"url\": \"https://firecrawl.dev/docs\"}'\n```\n\nThen open the chat interface in n8n to ask questions about the ingested content.","workflow":{"id":"7GvXseCzfctnyRwo","meta":{"instanceId":"ba63db282a94e75c9ed970aa4cb5b2f9d6030188b3dfa060dd78ea9e1993f61a","templateCredsSetupCompleted":true},"name":"Scrape and ingest web content into Supabase pgvector with Firecrawl","tags":[],"nodes":[{"id":"1221fcc2-23e9-40c8-8d25-5e8de01bf3fb","name":"Receive company URL","type":"n8n-nodes-base.webhook","position":[-1136,336],"webhookId":"dedaa64a-3dc9-43ea-82ac-7fac034af0b2","parameters":{"path":"dedaa64a-3dc9-43ea-82ac-7fac034af0b2","options":{},"httpMethod":"POST","responseMode":"responseNode"},"typeVersion":2.1},{"id":"12509942-87e2-422d-b97a-3502bb7b4f2a","name":"Validate and normalize URL","type":"n8n-nodes-base.code","onError":"continueErrorOutput","position":[-912,336],"parameters":{"jsCode":"const body = $input.first().json.body;\nconst raw = body?.url?.trim();\n\nif (!raw) {\n  return [{\n    json: {\n      status: 422,\n      message: \"Missing 'url' field in request body.\"\n    }\n  }];\n}\n\n// Strip protocol and path to get clean domain\nconst domain = raw.replace(/^https?:\\/\\//i, \"\").replace(/\\/.*$/, \"\");\n\n// Validate domain format\nconst isValid = /^[a-zA-Z0-9]([a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9])?(\\.[a-zA-Z]{2,})+$/.test(domain);\n\nif (!isValid) {\n  throw new Error(`Invalid URL: \"${raw}\" is not a valid domain or URL.`);\n}\nreturn [{\n  json: {\n    status: 200,\n    domain: domain,\n    url: `https://${domain}`\n  }\n}];"},"typeVersion":2},{"id":"82d40c90-d166-4f8b-8224-489322aa007c","name":"Check for duplicate in Supabase","type":"n8n-nodes-base.supabase","position":[-688,240],"parameters":{"filters":{"conditions":[{"keyName":"metadata","keyValue":"={\n  \"loc\": {\n    \"lines\": {\n      \"to\": 48,\n      \"from\": 1\n    }\n  },\n  \"url\": \"{{ $json.url }}\",\n  \"line\": 1,\n  \"source\": \"blob\",\n  \"blobType\": \"application/json\"\n}"}]},"tableId":"documents","operation":"get"},"credentials":{"supabaseApi":{"id":"79kYWf8C4WVwnwe3","name":"Supabase account 2"}},"typeVersion":1,"alwaysOutputData":true},{"id":"85705c58-aaf9-487d-b358-f0d87f49afef","name":"Return duplicate notice","type":"n8n-nodes-base.respondToWebhook","position":[-240,144],"parameters":{"options":{"responseCode":200},"respondWith":"json","responseBody":"{\n  \"message\": \"Already in the database\"\n}"},"typeVersion":1.5},{"id":"28f6fcb9-581a-4249-9a95-d5d6d3716873","name":"Scrape company website with Firecrawl","type":"@mendable/n8n-nodes-firecrawl.firecrawl","position":[-240,336],"parameters":{"url":"={{ $('Validate and normalize URL').item.json.url }}","operation":"scrape","scrapeOptions":{"options":{"formats":{"format":[{}]},"headers":{}}},"requestOptions":{}},"credentials":{"firecrawlApi":{"id":"2SnLAelRpQ8H5tju","name":"Firecrawl account"}},"typeVersion":1},{"id":"34256e66-c794-40ba-a579-b975dd2d2e82","name":"Return URL validation error","type":"n8n-nodes-base.respondToWebhook","position":[-688,432],"parameters":{"options":{"responseKey":"={{ $json.error }}","responseCode":422}},"typeVersion":1.5},{"id":"2b060cc6-1291-4913-ba4b-02d74917a945","name":"Load scraped content","type":"@n8n/n8n-nodes-langchain.documentDefaultDataLoader","position":[112,560],"parameters":{"options":{"metadata":{"metadataValues":[{"name":"url","value":"={{ $('Validate and normalize URL').item.json.url }}"}]}}},"typeVersion":1.1},{"id":"95bc5d9a-a4bb-4f61-a051-511f811f7757","name":"Generate OpenAI embeddings","type":"@n8n/n8n-nodes-langchain.embeddingsOpenAi","position":[-64,560],"parameters":{"options":{}},"credentials":{"openAiApi":{"id":"JbH4dWxIbojnxlW5","name":"OpenAi account"}},"typeVersion":1.2},{"id":"0f82ceff-00a2-4486-89bd-18c0aa789d75","name":"Receive chat message","type":"@n8n/n8n-nodes-langchain.chatTrigger","position":[-1136,704],"webhookId":"df0b1fa2-90b4-4b84-a099-2c92baa75cbb","parameters":{"options":{}},"typeVersion":1.4},{"id":"63d0275d-573b-4308-87a4-15510e8455a2","name":"Answer query from enriched leads","type":"@n8n/n8n-nodes-langchain.agent","position":[-912,704],"parameters":{"options":{}},"typeVersion":3.1},{"id":"434db832-19d9-4a2a-8937-eb505c1e9371","name":"OpenRouter LLM","type":"@n8n/n8n-nodes-langchain.lmChatOpenRouter","position":[-1008,896],"parameters":{"model":"anthropic/claude-sonnet-4.6","options":{}},"credentials":{"openRouterApi":{"id":"sUeQtILma9E44HnE","name":"OpenRouter account"}},"typeVersion":1},{"id":"f2f212d5-d6df-4a25-828b-d1447ff05712","name":"Chat memory","type":"@n8n/n8n-nodes-langchain.memoryBufferWindow","position":[-848,896],"parameters":{},"typeVersion":1.3},{"id":"666976cb-4d2f-4e29-8fe2-be220c02c26e","name":"Generate OpenAI embeddings1","type":"@n8n/n8n-nodes-langchain.embeddingsOpenAi","position":[-688,1056],"parameters":{"options":{}},"credentials":{"openAiApi":{"id":"JbH4dWxIbojnxlW5","name":"OpenAi account"}},"typeVersion":1.2},{"id":"ef08cbc2-9cb9-4ca4-8698-1748140d8fc7","name":"Rerank results with Cohere","type":"@n8n/n8n-nodes-langchain.rerankerCohere","position":[-528,1056],"parameters":{},"credentials":{"cohereApi":{"id":"ykb748QyEh1ziKPo","name":"CohereApi account"}},"typeVersion":1},{"id":"a92fe745-93f2-471b-a140-e9e0367bb5cd","name":"Sticky Note","type":"n8n-nodes-base.stickyNote","position":[-1776,336],"parameters":{"width":512,"height":448,"content":"### How it works\n1. A webhook receives a URL via POST request\n2. The URL is validated, normalized, and checked for duplicates in Supabase\n3. Firecrawl scrapes the page and converts it to clean markdown\n4. OpenAI generates vector embeddings from the scraped content\n5. The content and embeddings are stored in Supabase pgvector\n6. A built-in RAG chat agent lets you query the knowledge base using natural language, with Cohere reranking for better retrieval\n\n### Setup\n1. Create a Supabase project and run the SQL from the README to create the `documents` table with pgvector enabled\n2. Add your Firecrawl API key\n3. Add your OpenAI API key (for embeddings)\n4. Add your OpenRouter API key (for the chat agent)\n5. Add your Cohere API key (for reranking)\n6. Activate the workflow and send a POST request with `{\"url\": \"https://example.com\"}` to the webhook"},"typeVersion":1},{"id":"43f6a78c-69d8-4aa0-8fc7-9bcd44e8f2a4","name":"Sticky Note1","type":"n8n-nodes-base.stickyNote","position":[-1776,800],"parameters":{"color":7,"width":512,"height":96,"content":"## Supabase setup\nRun the SQL migration from the workflow README to create the `documents` table with pgvector enabled."},"typeVersion":1},{"id":"be2a6f00-ee44-4eb8-bb19-e361f5b3577f","name":"Skip if already ingested","type":"n8n-nodes-base.if","position":[-464,240],"parameters":{"options":{},"conditions":{"options":{"version":3,"leftValue":"","caseSensitive":true,"typeValidation":"strict"},"combinator":"and","conditions":[{"id":"fc4c27fb-9647-4457-a19b-2737a50dfb9f","operator":{"type":"object","operation":"notEmpty","singleValue":true},"leftValue":"={{$input.all()[0].json}}","rightValue":"1"}]}},"typeVersion":2.3},{"id":"b8c12e9c-9a86-408e-a015-bf6587605a32","name":"Store embeddings in Supabase","type":"@n8n/n8n-nodes-langchain.vectorStoreSupabase","position":[-16,336],"parameters":{"mode":"insert","options":{},"tableName":{"__rl":true,"mode":"list","value":"documents","cachedResultName":"documents"}},"credentials":{"supabaseApi":{"id":"Bo2nA2UKYkKDLrQF","name":"Supabase account"}},"typeVersion":1.3},{"id":"e46086f3-028a-44b2-8035-af14f2067b64","name":"Return ingestion result","type":"n8n-nodes-base.respondToWebhook","position":[336,336],"parameters":{"options":{"responseCode":200},"respondWith":"json","responseBody":"={\n  \"message\": \"Added {{$input.all().length}} items to Supabase\"\n}"},"executeOnce":true,"typeVersion":1.5},{"id":"d36fe25d-386d-4262-9faa-8d89f6a3abfd","name":"Retrieve documents from Supabase","type":"@n8n/n8n-nodes-langchain.vectorStoreSupabase","position":[-624,864],"parameters":{"mode":"retrieve-as-tool","options":{"metadata":{"metadataValues":[{"name":"url","value":"={{ $fromAI('url', 'to filter by URL add the specific URL here.', \"string\") }}"}]}},"tableName":{"__rl":true,"mode":"list","value":"documents","cachedResultName":"documents"},"useReranker":true,"toolDescription":"Retrieve data for the AI Agent."},"credentials":{"supabaseApi":{"id":"79kYWf8C4WVwnwe3","name":"Supabase account 2"}},"typeVersion":1.3}],"active":false,"pinData":{},"settings":{"binaryMode":"separate","availableInMCP":false,"executionOrder":"v1"},"versionId":"ec7ba37c-70dd-4ae0-b367-b4dce7095212","connections":{"Chat memory":{"ai_memory":[[{"node":"Answer query from enriched leads","type":"ai_memory","index":0}]]},"OpenRouter LLM":{"ai_languageModel":[[{"node":"Answer query from enriched leads","type":"ai_languageModel","index":0}]]},"Receive company URL":{"main":[[{"node":"Validate and normalize URL","type":"main","index":0}]]},"Load scraped content":{"ai_document":[[{"node":"Store embeddings in Supabase","type":"ai_document","index":0}]]},"Receive chat message":{"main":[[{"node":"Answer query from enriched leads","type":"main","index":0}]]},"Skip if already ingested":{"main":[[{"node":"Return duplicate notice","type":"main","index":0}],[{"node":"Scrape company website with Firecrawl","type":"main","index":0}]]},"Generate OpenAI embeddings":{"ai_embedding":[[{"node":"Store embeddings in Supabase","type":"ai_embedding","index":0}]]},"Rerank results with Cohere":{"ai_reranker":[[{"node":"Retrieve documents from Supabase","type":"ai_reranker","index":0}]]},"Validate and normalize URL":{"main":[[{"node":"Check for duplicate in Supabase","type":"main","index":0}],[{"node":"Return URL validation error","type":"main","index":0}]]},"Generate OpenAI embeddings1":{"ai_embedding":[[{"node":"Retrieve documents from Supabase","type":"ai_embedding","index":0}]]},"Store embeddings in Supabase":{"main":[[{"node":"Return ingestion result","type":"main","index":0}]]},"Check for duplicate in Supabase":{"main":[[{"node":"Skip if already ingested","type":"main","index":0}]]},"Retrieve documents from Supabase":{"ai_tool":[[{"node":"Answer query from enriched leads","type":"ai_tool","index":0}]]},"Scrape company website with Firecrawl":{"main":[[{"node":"Store embeddings in Supabase","type":"main","index":0}]]}}},"lastUpdatedBy":1,"workflowInfo":{"nodeCount":20,"nodeTypes":{"n8n-nodes-base.if":{"count":1},"n8n-nodes-base.code":{"count":1},"n8n-nodes-base.webhook":{"count":1},"n8n-nodes-base.supabase":{"count":1},"n8n-nodes-base.stickyNote":{"count":2},"@n8n/n8n-nodes-langchain.agent":{"count":1},"n8n-nodes-base.respondToWebhook":{"count":3},"@n8n/n8n-nodes-langchain.chatTrigger":{"count":1},"@mendable/n8n-nodes-firecrawl.firecrawl":{"count":1},"@n8n/n8n-nodes-langchain.rerankerCohere":{"count":1},"@n8n/n8n-nodes-langchain.embeddingsOpenAi":{"count":2},"@n8n/n8n-nodes-langchain.lmChatOpenRouter":{"count":1},"@n8n/n8n-nodes-langchain.memoryBufferWindow":{"count":1},"@n8n/n8n-nodes-langchain.vectorStoreSupabase":{"count":2},"@n8n/n8n-nodes-langchain.documentDefaultDataLoader":{"count":1}}},"status":"published","readyToDemo":null,"user":{"name":"Firecrawl","username":"firecrawl","bio":"","verified":true,"links":[],"avatar":"https://gravatar.com/avatar/145ca947664fc7f7d1772e11835fa6e42678f604e2fac83255bc1633c48d98be?r=pg&d=retro&size=200"},"nodes":[{"id":20,"icon":"fa:map-signs","name":"n8n-nodes-base.if","codex":{"data":{"alias":["Router","Filter","Condition","Logic","Boolean","Branch"],"details":"The 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