HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Stocks, Crypto, News

Domain DNS, email security and TLS certificate

hubvibe_domain_dns

Read-onlyIdempotent

DNS lookup and domain health check: A, AAAA, CNAME, MX, NS, TXT, CAA and SOA records asked of the source, SPF and DMARC email policy parsed, and the HTTPS certificate verified like a browser (issuer, names, expiry, days left, TLS version). Flags missing SPF or DMARC, duplicate SPF and certificates near expiry. Input: domain (a URL is accepted). $0.05 per call. Returns: domain, domain_ascii, exists, records{a[], aaaa[], cname[], mx[], ns[], txt[], caa[], soa[]}, email_security{spf{record, all, multiple}, dmarc{record, policy, subdomain_policy, percent, reports_to}}, tls{reachable, valid, error, ip, protocol, subject, issuer, names[], not_before, not_after, days_remaining}, notes[], checked_at.

Input Schema

TableJSON Schema

Name	Required	Description
`tls`	No	Also check the HTTPS certificate. Default true.
`domain`	Yes	A domain (github.com) or a URL on it.
`language`	No	Optional BCP-47 language tag (en, ja, ko, pt-BR): the human-readable strings of the result (notes, details, reasons) are translated into this language; data, codes, numbers and URLs are untouched. Default: as produced.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes
`status`	Yes
`worker`	Yes
`price_usd`	Yes
`provenance`	Yes
`receipt_id`	Yes
`attribution`	No
`receipt_url`	Yes
`billing_warning`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed23 schema fields changedOct 1, 2026

removedOutput schema / description

Removed value: -"The 200 body of every paid /work call. `result` is the worker's own output (its schema is per route); everything else is the same on every /work route. A receipt for the job is at `receipt_url`."

removedOutput schema / properties / attribution / description

Removed value: -"Present only when the result's text was machine-translated: the credit to show with it."

removedOutput schema / properties / attribution / items / description
```
Removed value: -"A credit."
```

removedOutput schema / properties / attribution / items / properties

Removed value: -{
-  "text": {
-    "description": "Credit.",
-    "examples": [
-      "Translated by Google"
-    ],
-    "type": "string"
-  },
-  "url": {
-    "description": "Link.",
-    "examples": [
-      "https://translate.google.com"
-    ],
-    "type": "string"
-  }
-}

removedOutput schema / properties / attribution / items / required
```
Removed value: -[
-  "text",
-  "url"
-]
```
removedOutput schema / properties / attribution / items / type
```
Removed value: -"object"
```

removedOutput schema / properties / billing_warning / description

Removed value: -"Present only when the charge was recorded with a caveat."

removedOutput schema / properties / billing_warning / examples
```
Removed value: -[
-  "settlement pending"
-]
```
removedOutput schema / properties / price_usd / description
```
Removed value: -"What this call cost, in USD."
```
removedOutput schema / properties / price_usd / examples
```
Removed value: -[
-  0.02
-]
```

removedOutput schema / properties / provenance / description

Removed value: -"How the result was produced: which providers ran and how long each took."

removedOutput schema / properties / provenance / properties

Removed value: -{
-  "attempts": {
-    "description": "Provider attempts made, including retries and failovers.",
-    "examples": [
-      1
-    ],
-    "type": "integer"
-  },
-  "elapsed_ms": {
-    "description": "Wall-clock milliseconds for the whole job.",
-    "examples": [
-      340
-    ],
-    "type": "integer"
-  },
-  "providers_used": {
-    "description": "Providers that served the job.",
-    "examples": [
-      [
-        "coinbase-advanced-trade-public"
-      ]
-    ],
-    "items": {
-      "description": "Provider name.",
-      "examples": [
-        "coinbase-advanced-trade-public"
-      ],
-      "type": "string"
-    },
-    "type": "array"
-  },
-  "steps": {
-    "description": "Every step the job ran, in order.",
-    "items": {
-      "description": "One step of the job.",
-      "properties": {
-        "ms": {
-          "description": "Milliseconds the step took.",
-          "examples": [
-            312
-          ],
-          "type": "integer"
-        },
-        "ok": {
-          "description": "Whether the step succeeded.",
-          "examples": [
-            true
-          ],
-          "type": "boolean"
-        },
-        "provider": {
-          "description": "Provider that served the step.",
-          "examples": [
-            "coinbase-advanced-trade-public"
-          ],
-          "type": "string"
-        },
-        "reason": {
-          "description": "Failure reason, on a failed step.",
-          "examples": [
-            "provider_timeout"
-          ],
-          "type": "string"
-        },
-        "step": {
-          "description": "Step name inside the worker.",
-          "examples": [
-            "quote"
-          ],
-          "type": "string"
-        }
-      },
-      "required": [
-        "step",
-        "ok",
-        "ms"
-      ],
-      "type": "object"
-    },
-    "type": "array"
-  }
-}

removedOutput schema / properties / provenance / required

Removed value: -[
-  "steps",
-  "providers_used",
-  "attempts",
-  "elapsed_ms"
-]

removedOutput schema / properties / receipt_id / description
```
Removed value: -"Receipt id for this job."
```
removedOutput schema / properties / receipt_id / examples
```
Removed value: -[
-  "rcpt_9f1c2b3a4d5e6f70"
-]
```

removedOutput schema / properties / receipt_url / description

Removed value: -"Where to fetch the machine-readable receipt (free, no payment)."

removedOutput schema / properties / receipt_url / examples

Removed value: -[
-  "/work/receipts/rcpt_9f1c2b3a4d5e6f70"
-]

removedOutput schema / properties / result / properties

Removed value: -{
-  "checked_at": {
-    "description": "When this node read the source (UTC). Nothing here is cached.",
-    "examples": [
-      "2026-09-26T18:00:00Z"
-    ],
-    "format": "date-time",
-    "type": "string"
-  },
-  "domain": {
-    "description": "The domain as given (host part).",
-    "examples": [
-      "github.com"
-    ],
-    "type": "string"
-  },
-  "domain_ascii": {
-    "description": "ASCII (punycode) form queried.",
-    "examples": [
-      "github.com"
-    ],
-    "type": "string"
-  },
-  "email_security": {
-    "description": "Email authentication policy.",
-    "properties": {
-      "dmarc": {
-        "description": "DMARC; null when there is none.",
-        "properties": {
-          "percent": {
-            "description": "pct= value.",
-            "examples": [
-              100
-            ],
-            "type": [
-              "integer",
-              "null"
-            ]
-          },
-          "policy": {
-            "description": "p= policy.",
-            "examples": [
-              "reject"
-            ],
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "record": {
-            "description": "The DMARC record.",
-            "examples": [
-              "v=DMARC1; p=reject"
-            ],
-            "type": "string"
-          },
-          "reports_to": {
-            "description": "rua= address.",
-            "examples": [
-              "mailto:dmarc@example.com"
-            ],
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "subdomain_policy": {
-            "description": "sp= policy.",
-            "examples": [
-              "reject"
-            ],
-            "type": [
-              "string",
-              "null"
-            ]
-          }
-        },
-        "required": [
-          "record",
-          "policy",
-          "subdomain_policy",
-          "percent",
-          "reports_to"
-        ],
-        "type": [
-          "object",
-          "null"
-        ]
-      },
-      "spf": {
-        "description": "SPF; null when there is none.",
-        "properties": {
-          "all": {
-            "description": "What the record says about everyone else.",
-            "enum": [
-              "fail",
-              "softfail",
-              "neutral",
-              "pass",
-              null
-            ],
-            "examples": [
-              "softfail"
-            ],
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "multiple": {
-            "description": "More than one SPF record (an error).",
-            "examples": [
-              false
-            ],
-            "type": "boolean"
-          },
-          "record": {
-            "description": "The SPF record.",
-            "examples": [
-              "v=spf1 include:_spf.google.com ~all"
-            ],
-            "type": "string"
-          }
-        },
-        "required": [
-          "record",
-          "all",
-          "multiple"
-        ],
-        "type": [
-          "object",
-          "null"
-        ]
-      }
-    },
-    "required": [
-      "spf",
-      "dmarc"
-    ],
-    "type": "object"
-  },
-  "exists": {
-    "description": "The domain exists in DNS.",
-    "examples": [
-      true
-    ],
-    "type": "boolean"
-  },
-  "notes": {
-    "description": "Findings and caveats.",
-    "examples": [
-      []
-    ],
-    "items": {
-      "description": "A caveat.",
-      "examples": [
-        "No DMARC record."
-      ],
-      "type": "string"
-    },
-    "type": "array"
-  },
-  "records": {
-    "description": "Records by type; empty when none.",
-    "properties": {
-      "a": {
-        "description": "A records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A A record.",
-          "examples": [
-            "140.82.112.3"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "aaaa": {
-        "description": "AAAA records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A AAAA record.",
-          "examples": [
-            "2606:50c0:8000::153"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "caa": {
-        "description": "CAA records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A CAA record.",
-          "examples": [
-            "0 issue \"digicert.com\""
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "cname": {
-        "description": "CNAME records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A CNAME record.",
-          "examples": [
-            "github.github.io"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "mx": {
-        "description": "MX records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A MX record.",
-          "examples": [
-            "1 aspmx.l.google.com"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "ns": {
-        "description": "NS records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A NS record.",
-          "examples": [
-            "dns1.p08.nsone.net"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "soa": {
-        "description": "SOA records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A SOA record.",
-          "examples": [
-            "dns1.p08.nsone.net hostmaster.nsone.net serial=1 refresh=43200 retry=7200 expire=1209600 minimum=3600"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "txt": {
-        "description": "TXT records.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A TXT record.",
-          "examples": [
-            "v=spf1 include:_spf.google.com ~all"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "a",
-      "aaaa",
-      "cname",
-      "mx",
-      "ns",
-      "txt",
-      "caa",
-      "soa"
-    ],
-    "type": "object"
-  },
-  "tls": {
-    "description": "HTTPS certificate; null when not checked.",
-    "properties": {
-      "days_remaining": {
-        "description": "Days until expiry.",
-        "examples": [
-          62
-        ],
-        "type": [
-          "integer",
-          "null"
-        ]
-      },
-      "error": {
-        "description": "Why the check failed.",
-        "examples": [
-          "certificate has expired"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "ip": {
-        "description": "Address connected to.",
-        "examples": [
-          "140.82.112.3"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "issuer": {
-        "description": "Issuing CA.",
-        "examples": [
-          "Sectigo Limited"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "names": {
-        "description": "Subject alternative names.",
-        "examples": [
-          []
-        ],
-        "items": {
-          "description": "A name the certificate covers.",
-          "examples": [
-            "www.github.com"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "not_after": {
-        "description": "Valid until.",
-        "examples": [
-          "2026-11-29T23:59:59Z"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "not_before": {
-        "description": "Valid from.",
-        "examples": [
-          "2026-08-01T00:00:00Z"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "protocol": {
-        "description": "TLS version.",
-        "examples": [
-          "TLSv1.3"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "reachable": {
-        "description": "An HTTPS server answered on port 443.",
-        "examples": [
-          true
-        ],
-        "type": "boolean"
-      },
-      "subject": {
-        "description": "Certificate common name.",
-        "examples": [
-          "github.com"
-        ],
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "valid": {
-        "description": "The certificate verified for this name.",
-        "examples": [
-          true
-        ],
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "reachable",
-      "valid",
-      "error",
-      "ip"
-    ],
-    "type": [
-      "object",
-      "null"
-    ]
-  }
-}

removedOutput schema / properties / result / required

Removed value: -[
-  "domain",
-  "domain_ascii",
-  "exists",
-  "records",
-  "email_security",
-  "tls",
-  "notes",
-  "checked_at"
-]

removedOutput schema / properties / status / description

Removed value: -"Present only on a delivered result."

removedOutput schema / properties / worker / description

Removed value: -"Catalog name of the worker that ran."

removedOutput schema / properties / worker / examples
```
Removed value: -[
-  "market.quote"
-]
```
removedOutput schema / title
```
Removed value: -"domain.dns response"
```

AddedSep 28, 2026

TDQS

A3.9/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, openWorld, and non-destructive, so safety is covered. The description goes beyond that by disclosing pricing ($0.05 per call), the flagging behavior (missing/duplicate SPF, DMARC gaps, near-expiry certs), and the browser-like TLS check, which are genuinely useful traits not in the structured annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Dense but front-loaded with the core purpose before the detail, and every clause is informative. However, the long 'Returns:' enumeration substantially duplicates the output schema, which is redundant given a formal output schema exists, keeping it off a 5.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a read-only lookup with full schema coverage and a formal output schema, the description is complete enough to invoke correctly. The return-value listing is redundant against the output schema, and version/pagination or rate-limit context is absent, but nothing essential is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so parameters are already documented in the schema. The description only restates that domain accepts a URL, which the schema also says, and says nothing about the tls toggle or language option. Baseline 3 is appropriate when the schema carries the parameter burden.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('DNS lookup and domain health check') and enumerates exactly what it covers: A/AAAA/CNAME/MX/NS/TXT/CAA/SOA records, SPF/DMARC parsing, and TLS verification. This distinguishes it clearly from siblings like hubvibe_ip_lookup, hubvibe_email_verify, and the audit_* tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the scenario (domain health check, flags missing SPF/DMARC) but never states when to use this versus alternatives such as hubvibe_email_verify or hubvibe_ip_lookup, nor any prerequisites or exclusions. A competent agent can infer usage, but no explicit routing guidance is given.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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