---
schema: "interfacedelta-service-md/1"
target_key: "sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e"
origin: "https://www.usedby.ai"
protocols: ["mcp"]
observed_at: "2026-11-12T11:08:08.481Z"
generated_at: "2026-11-13T00:52:52.866Z"
record_url: "https://interfacedelta.com/atlas/sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e"
record_api: "https://interfacedelta.com/api/v1/record/services/sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e"
source: "InterfaceDelta atlas"
license_note: "Use of this record is governed by https://interfacedelta.com/terms."
---

# Service record: https://www.usedby.ai

## Identity
- Origin: https://www.usedby.ai
- Endpoints: https://www.usedby.ai/mcp
- Protocols: mcp
- Registry names: ai.usedby/usedby
- First retained observation: 2026-11-12T11:08:08.481Z
- Latest observation: 2026-11-12T11:08:08.481Z

## Tools
- Tool 1: company\_stack (mcp); inputs: company, limit, offset, snapshot; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 2: compare (mcp); inputs: a, b, constraint, includeCapabilities, includeEvidence, limit, offset, snapshot; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 3: recent\_changes (mcp); inputs: days, limit, tool; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 4: search\_tools (mcp); inputs: limit, query; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 5: shortlist\_tools (mcp); inputs: context, operation, preferred, required, task; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 6: what\_peers\_use (mcp); inputs: company, constraints, country, industry, job, limit, locale, profession; inputs omitted: 2; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 7: who\_uses (mcp); inputs: constraint, includeCapabilities, includeEvidence, industry, limit, offset, size, snapshot; inputs omitted: 1; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
Tools omitted: 0.

## Effect readings (AI)
- Tool 1 (company\_stack): ◇ AI reading; state: counted; reads (confidence 0.88); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 1 purpose: ◇ AI reading; Lists software a firm is publicly reported to use, ranked by evidence strength, with proof levels and source pages.; lens: tool-purpose-v1; model: not recorded.
- Tool 2 (compare): ◇ AI reading; state: counted; reads (confidence 0.9); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 2 purpose: ◇ AI reading; Returns a side-by-side comparison of two named tools: their public customers, industries, shared companies and sourced vendor facts.; lens: tool-purpose-v1; model: not recorded.
- Tool 3 (recent\_changes): ◇ AI reading; state: counted; reads (confidence 0.88); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 3 purpose: ◇ AI reading; Lists companies recently added as customers by software providers within a set number of days, optionally filtered to one tool.; lens: tool-purpose-v1; model: not recorded.
- Tool 4 (search\_tools): ◇ AI reading; state: counted; reads (confidence 0.92); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 4 purpose: ◇ AI reading; Lists AI and software tools matching a name or category, with the number of companies publicly using each.; lens: tool-purpose-v1; model: not recorded.
- Tool 5 (shortlist\_tools): ◇ AI reading; state: counted; reads (confidence 0.8); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 5 purpose: ◇ AI reading; Returns a shortlist of software tools for a given task, checked against required and preferred criteria like pricing or data residency.; lens: tool-purpose-v1; model: not recorded.
- Tool 6 (what\_peers\_use): ◇ AI reading; state: counted; reads (confidence 0.84); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 6 purpose: ◇ AI reading; Lists tools that peer firms of similar sector and headcount use for a task, based on public usage evidence.; lens: tool-purpose-v1; model: not recorded.
- Tool 7 (who\_uses): ◇ AI reading; state: counted; reads (confidence 0.85); lens: side-effects@1; model: claude-haiku-5.5.

## Change history
No changes recorded in the retained history.

## Payment rails
- Protocols observed: none.
- HTTP 402 seen in retained observations: false.

## Not covered
- We don't call tools.
- We don't rate or certify.
- We don't publish prices.
- We cover only what was observed.

## Evidence
- Identity: observed / declared; observation time: 2026-11-12T11:08:08.481Z.
- Tools: declared; observation time: 2026-11-12T11:08:08.481Z.
- Effect readings (AI): AI reading; observation time: 2026-11-12T11:08:08.481Z.
- Change history: observed; observation time: 2026-11-12T11:08:08.481Z; change observation times: none.
- Payment rails: observed; observation time: 2026-11-12T11:08:08.481Z.

```json
{
  "schema": "interfacedelta-service-md/1",
  "target_key": "sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e",
  "origin": "https://www.usedby.ai",
  "protocols": [
    "mcp"
  ],
  "observed_at": "2026-11-12T11:08:08.481Z",
  "generated_at": "2026-11-13T00:52:52.866Z",
  "record_url": "https://interfacedelta.com/atlas/sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e",
  "record_api": "https://interfacedelta.com/api/v1/record/services/sha256:37c7051e3ea385e9a32ab337531e8e844bd8e13713896ab676b72678648d6b9e",
  "source": "InterfaceDelta atlas",
  "license_note": "Use of this record is governed by https://interfacedelta.com/terms.",
  "identity": {
    "origin": "https://www.usedby.ai",
    "endpoints": [
      "https://www.usedby.ai/mcp"
    ],
    "protocols": [
      "mcp"
    ],
    "registry_names": [
      "ai.usedby/usedby"
    ],
    "first_retained_observation": "2026-11-12T11:08:08.481Z",
    "latest_observation": "2026-11-12T11:08:08.481Z"
  },
  "tools": [
    {
      "name": "company_stack",
      "protocol": "mcp",
      "inputs": [
        "company",
        "limit",
        "offset",
        "snapshot"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.88
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Lists software a firm is publicly reported to use, ranked by evidence strength, with proof levels and source pages.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "compare",
      "protocol": "mcp",
      "inputs": [
        "a",
        "b",
        "constraint",
        "includeCapabilities",
        "includeEvidence",
        "limit",
        "offset",
        "snapshot"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.9
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Returns a side-by-side comparison of two named tools: their public customers, industries, shared companies and sourced vendor facts.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "recent_changes",
      "protocol": "mcp",
      "inputs": [
        "days",
        "limit",
        "tool"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.88
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Lists companies recently added as customers by software providers within a set number of days, optionally filtered to one tool.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "search_tools",
      "protocol": "mcp",
      "inputs": [
        "limit",
        "query"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.92
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Lists AI and software tools matching a name or category, with the number of companies publicly using each.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "shortlist_tools",
      "protocol": "mcp",
      "inputs": [
        "context",
        "operation",
        "preferred",
        "required",
        "task"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.8
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Returns a shortlist of software tools for a given task, checked against required and preferred criteria like pricing or data residency.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "what_peers_use",
      "protocol": "mcp",
      "inputs": [
        "company",
        "constraints",
        "country",
        "industry",
        "job",
        "limit",
        "locale",
        "profession"
      ],
      "inputs_omitted": 2,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.84
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      },
      "purpose": {
        "marker": "◇ AI reading",
        "text": "Lists tools that peer firms of similar sector and headcount use for a task, based on public usage evidence.",
        "lens": "tool-purpose-v1",
        "model": null
      }
    },
    {
      "name": "who_uses",
      "protocol": "mcp",
      "inputs": [
        "constraint",
        "includeCapabilities",
        "includeEvidence",
        "industry",
        "limit",
        "offset",
        "size",
        "snapshot"
      ],
      "inputs_omitted": 1,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.85
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    }
  ],
  "tools_omitted": 0,
  "tools_state": "recorded",
  "changes": [],
  "payment_rails": {
    "protocols": [],
    "http_402_seen": false
  },
  "not_covered": [
    "We don't call tools.",
    "We don't rate or certify.",
    "We don't publish prices.",
    "We cover only what was observed."
  ],
  "evidence": [
    {
      "section": "Identity",
      "classes": [
        "observed",
        "declared"
      ],
      "observed_at": "2026-11-12T11:08:08.481Z"
    },
    {
      "section": "Tools",
      "classes": [
        "declared"
      ],
      "observed_at": "2026-11-12T11:08:08.481Z"
    },
    {
      "section": "Effect readings (AI)",
      "classes": [
        "AI reading"
      ],
      "observed_at": "2026-11-12T11:08:08.481Z"
    },
    {
      "section": "Change history",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-12T11:08:08.481Z",
      "observation_times": []
    },
    {
      "section": "Payment rails",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-12T11:08:08.481Z"
    }
  ]
}
```