Fillin
io.github.artchristech/fillin
11 toolsHTTPregistry active
Summary
Bridges the knowledge cutoff gap by searching current information across CVE databases, academic papers, frontier AI developments, and prediction markets. When your LLM doesn't know about the latest security vulnerability, recent research, or breaking AI news, this server pulls fresh data to fill those gaps. The streamable HTTP transport means you can hook it up remotely without local installation. Essentially a real-time search layer that keeps AI agents current on technical developments they wouldn't otherwise know about. Reach for it when you need Claude to reason about events, exploits, or research published after its training data ends.
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Public tool metadata for what this MCP can expose to an agent.
11 tools
fillin_queryRetrieve documents published after a training cutoff, ranked by similarity. Call this whenever the user asks about events, releases, papers, issues, or news that might post-date your training data. Fillin only returns documents published AFTER `cutoff`, so nothing returned is...3 params
Retrieve documents published after a training cutoff, ranked by similarity. Call this whenever the user asks about events, releases, papers, issues, or news that might post-date your training data. Fillin only returns documents published AFTER `cutoff`, so nothing returned is...
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date (e.g. 2026-01-01). Documents on or before this date are excluded.
kintegerNumber of documents to retrieve (1-20).default: 5
querystringNatural-language search query, max 512 chars.
fillin_answerSynthesized post-cutoff answer with inline citations. Use this when your model is small / cheap / weaker at tool-result synthesis (Llama, Gemini Flash, Mistral, Nemotron, Qwen). Fillin runs a server-side LLM pass over the retrieved post-cutoff documents and returns a 150-250 w...3 params
Synthesized post-cutoff answer with inline citations. Use this when your model is small / cheap / weaker at tool-result synthesis (Llama, Gemini Flash, Mistral, Nemotron, Qwen). Fillin runs a server-side LLM pass over the retrieved post-cutoff documents and returns a 150-250 w...
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date (e.g. 2026-01-01).
kintegerNumber of documents to ground the answer in (1-20).default: 5
querystringNatural-language question, max 512 chars.
fillin_statsGet corpus stats — total docs, date range, freshness.
Get corpus stats — total docs, date range, freshness.
No parameter schema in public metadata yet.
fillin_healthLiveness + freshness — host, total docs, earliest, latest. No auth required.
Liveness + freshness — host, total docs, earliest, latest. No auth required.
No parameter schema in public metadata yet.
query_cvesDaily snapshot of CVE / supply-chain advisories from NVD, GitHub Security Advisories, and OSV. Use before merging dependency updates, when triaging an alert, or when a user asks "is package X compromised". Each result row carries a structured `affected` list (one entry per aff...4 params
Daily snapshot of CVE / supply-chain advisories from NVD, GitHub Security Advisories, and OSV. Use before merging dependency updates, when triaging an alert, or when a user asks "is package X compromised". Each result row carries a structured `affected` list (one entry per aff...
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date.
kinteger1-20default: 5
min_severityvalueOptional CVSS baseScore floor (0.0-10.0). When set, rows with a populated severity_score below this value are dropped, and rows whose severity is unknown are skipped. Use 7.0 for high+critical only...
querystringVulnerability / supply-chain query.
query_papersDaily snapshot of new research relevant to AI/ML/agents. Union of arXiv (cs.AI/cs.LG/cs.CL/cs.CR/cs.DC), HuggingFace daily papers (with upvote signal in title), and bioRxiv. Use when a user asks about a new technique, paper, or benchmark.3 params
Daily snapshot of new research relevant to AI/ML/agents. Union of arXiv (cs.AI/cs.LG/cs.CL/cs.CR/cs.DC), HuggingFace daily papers (with upvote signal in title), and bioRxiv. Use when a user asks about a new technique, paper, or benchmark.
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date.
kinteger1-20default: 5
querystringResearch / paper query.
query_frontierDaily snapshot of frontier AI lab announcements + HuggingFace trending model releases. Sources: OpenAI / DeepMind / Meta / Mistral blog RSS, Anthropic + HF blogs (via shared rss corpus), and the HF trending models API. Use when a user asks "what model dropped" or "did <lab> an...3 params
Daily snapshot of frontier AI lab announcements + HuggingFace trending model releases. Sources: OpenAI / DeepMind / Meta / Mistral blog RSS, Anthropic + HF blogs (via shared rss corpus), and the HF trending models API. Use when a user asks "what model dropped" or "did <lab> an...
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date.
kinteger1-20default: 5
querystringFrontier-lab / model-release query.
query_marketsActive prediction markets across Polymarket, Kalshi, Manifold, and Metaculus. Use when a user asks "is there a market on X", "what odds is the market giving Y", or before any agent action that should be informed by a market price. Each result row carries the question, venue, c...3 params
Active prediction markets across Polymarket, Kalshi, Manifold, and Metaculus. Use when a user asks "is there a market on X", "what odds is the market giving Y", or before any agent action that should be informed by a market price. Each result row carries the question, venue, c...
Parameters* required
cutoffstringTraining cutoff as ISO-8601 date.
kinteger1-20default: 5
querystringPrediction-market / forecast query.
fillin_market_searchSearch the Fillin marketplace for minted (data + reasoning) assets matching your fingerprint. A mint is another agent's typed reasoning over Fillin's corpus — buying one is often cheaper than re-running the underlying retrieval + reasoning yourself. Returns {fingerprint, mints...5 params
Search the Fillin marketplace for minted (data + reasoning) assets matching your fingerprint. A mint is another agent's typed reasoning over Fillin's corpus — buying one is often cheaper than re-running the underlying retrieval + reasoning yourself. Returns {fingerprint, mints...
Parameters* required
cluster_idvalueOptional query-cluster id from a daily clustering job. Leave None for the wildcard '*' bucket.
cutoff_quarterstringYour training cutoff coarsened to a quarter — e.g. '2026-Q1'.
limitintegerdefault: 20
model_familystringYour model family — e.g. 'claude-opus-4-7', 'gpt-5'.
only_for_salebooleanIf true (default), return only listed mints.default: true
fillin_mintMint a (data + reasoning) asset on the Fillin marketplace. Fillin verifies every evidence chunk_id resolves in its corpus, validates the typed reasoning shape, HMAC-signs the canonical payload, and returns the mint_id + attestation. Other agents with the same fingerprint can t...7 params
Mint a (data + reasoning) asset on the Fillin marketplace. Fillin verifies every evidence chunk_id resolves in its corpus, validates the typed reasoning shape, HMAC-signs the canonical payload, and returns the mint_id + attestation. Other agents with the same fingerprint can t...
Parameters* required
conclusionstringYour synthesized answer. This is what buyers pay for.
cutoff_quarterstringYour cutoff quarter, e.g. '2026-Q1'.
evidencearrayFillin chunk citations you reasoned over. Each entry: {chunk_id: <Fillin id>, url?: <source url>}.
list_price_usdcvalueResale price you want, in USDC. Pass None to mint without listing.
model_familystringYour model family.
querystringThe original question you asked Fillin (or paraphrased).
reasoning_grapharrayTyped reasoning steps. Each: {claim, evidence_chunk_id, confidence (0..1), derived_claim?}. Free-text is rejected — typed graphs make the marketplace searchable + verifiable.
fillin_buy_mintBuy a listed mint. Debits your bearer balance, credits the seller (minus Fillin's rake), records the transaction, and returns the full mint payload including the previously-paywalled reasoning_graph. Requires FILLIN_API_KEY with sufficient balance for the mint's list price.3 params
Buy a listed mint. Debits your bearer balance, credits the seller (minus Fillin's rake), records the transaction, and returns the full mint payload including the previously-paywalled reasoning_graph. Requires FILLIN_API_KEY with sufficient balance for the mint's list price.
Parameters* required
cutoff_quarterstringYour cutoff quarter, e.g. '2026-Q1'.
mint_idstringThe Fillin mint_id (e.g. 'mt_…').
model_familystringYour model family — recorded with the buy so the buyer-side demand oracle is accurate.
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Registryactive
TransportHTTP
UpdatedMay 23, 2026
