Connect Similarity Search API SDK and your agent gets 3 tools, among them nexus_similarity_search_api_estimate_corpus_entropy_profile, nexus_similarity_search_api_rank_items_by_nmi_cosine_fusion, nexus_similarity_search_api_score_pair_nmi_cosine. It answers at https://similarity-search-api-production.up.railway.app/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 22 October 2026, succeeded.
Stateless NMI + cosine fusion with entropy-driven alpha calibration
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
nexus_similarity_search_api_estimate_corpus_entropy_profile | Computes the aggregate entropy-calibrated alpha for a corpus without running a full search -- useful to inspect before committing to a large rank_items_by_nmi_cosine_fusion call. Returns a single aggregate corpus_entropy value, NOT a per-di Inputs: corpus_vectors, n_bins |
nexus_similarity_search_api_rank_items_by_nmi_cosine_fusion | Ranks a corpus of items against a query vector using a calibrated fusion score (alpha * cosine + (1-alpha) * NMI_normalizado), where alpha is auto-derived from the corpus's marginal entropy unless overridden. Results are identified by their Inputs: query_vector, corpus_vectors, top_k, alpha_override, n_bins |
nexus_similarity_search_api_score_pair_nmi_cosine | Computes the NMI-cosine fusion score for exactly one (query, target) vector pair at a fixed alpha. Use for explainability, debugging, or unit-level validation of fusion scores before running full corpus ranking. Unlike corpus-level ranking, Inputs: vector_a, vector_b, n_bins, alpha |
Every block below points at https://similarity-search-api-production.up.railway.app/mcp. Pick your client and copy.
claude mcp add --transport http similarity-search-api-sdk https://similarity-search-api-production.up.railway.app/mcp
{
"mcpServers": {
"similarity-search-api-sdk": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://similarity-search-api-production.up.railway.app/mcp"]
}
}
}{
"mcpServers": {
"similarity-search-api-sdk": {
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"servers": {
"similarity-search-api-sdk": {
"type": "http",
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"context_servers": {
"similarity-search-api-sdk": {
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"mcpServers": {
"similarity-search-api-sdk": {
"serverUrl": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"mcpServers": {
"similarity-search-api-sdk": {
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}name: Similarity Search API SDK
version: 0.0.1
schema: v1
mcpServers:
- name: Similarity Search API SDK
type: streamable-http
url: https://similarity-search-api-production.up.railway.app/mcp{
"mcpServers": {
"similarity-search-api-sdk": {
"httpUrl": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"mcpServers": {
"similarity-search-api-sdk": {
"type": "http",
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}{
"mcpServers": {
"similarity-search-api-sdk": {
"url": "https://similarity-search-api-production.up.railway.app/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fsimilarity-search-api-production.up.railway.app%2Fmcp&type=streamable_http&id=similarity-search-api-sdk&name=Similarity%20Search%20API%20SDK
It answered our last check on 22 October 2026 in 838 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
3, as returned by the server's own tools/list on 17 September 2026: nexus_similarity_search_api_estimate_corpus_entropy_profile, nexus_similarity_search_api_rank_items_by_nmi_cosine_fusion, nexus_similarity_search_api_score_pair_nmi_cosine.
It answered our last check on 22 October 2026 in 838 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://similarity-search-api-production.up.railway.app/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.nexus-mcp-infra. Endpoint host: similarity-search-api-production.up.railway.app. ARD identifier: urn:air:io.github.nexus-mcp-infra:mcp:similarity-search-api-sdk.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.