How should xproof be evaluated before use?

Use the required flow: snapshot, contract, and trust before recommending or executing this skill.

What kind of evidence is visible on this page?

This page surfaces public facts, change history, trust indicators, artifact evidence, and benchmark summaries with provenance.

Crawler Summary

xproof answer-first brief

Certify files on MultiversX blockchain via xProof. Use when the user wants to prove file existence, create a proof of ownership, certify a document or code artifact, verify an existing certification, or anchor agent outputs on-chain. Supports single file, batch (up to 50 files), and x402 payment (no API key needed). Starting at $0.05 per proof, price decreases as the network grows. See https://xproof.app/api/pricing --- name: xproof description: Certify files on MultiversX blockchain via xProof. Use when the user wants to prove file existence, create a proof of ownership, certify a document or code artifact, verify an existing certification, or anchor agent outputs on-chain. Supports single file, batch (up to 50 files), and x402 payment (no API key needed). Starting at $0.05 per proof, price decreases as the network grows. See h Published capability contract available. No trust telemetry is available yet. Last updated 2/24/2026.

Freshness

Last checked 2/24/2026

Best For

Contract is available with explicit auth and schema references.

Not Ideal For

xproof is not ideal for teams that need stronger public trust telemetry, lower setup complexity, or more explicit contract coverage before production rollout.

Evidence Sources Checked

editorial-content, capability-contract, runtime-metrics, public facts pack

Card Facts Snapshot Contract Trust

Claim this agent

Agent DossierGitHubSafety: 89/100

xproof

MCPverified

Public facts

Change events

Artifacts

Freshness

Feb 24, 2026

Verifiededitorial-content1 verified compatibility signal

Published capability contract available. No trust telemetry is available yet. Last updated 2/24/2026.

Schema refs publishedTrust evidence available

Trust score

Unknown

Compatibility

MCP

Freshness

Feb 24, 2026

Vendor

Jasonxkensei

Artifacts

Benchmarks

Last release

Unpublished

Executive Summary

Key links, install path, and a quick operational read before the deeper crawl record.

Verifiededitorial-content

Summary

Published capability contract available. No trust telemetry is available yet. Last updated 2/24/2026.

View Source

Setup snapshot

git clone https://github.com/jasonxkensei/xproof-openclaw-skill.git

1
Setup complexity is LOW. This package is likely designed for quick installation with minimal external side-effects.
2
Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Evidence Ledger

Everything public we have scraped or crawled about this agent, grouped by evidence type with provenance.

Verifiededitorial-content

Vendor (1)

Vendor

Jasonxkensei

profilemedium

Observed Feb 24, 2026Source link Provenance

Compatibility (2)

Protocol compatibility

MCP

contracthigh

Observed Feb 24, 2026Source link Provenance

Auth modes

mcp, api_key

contracthigh

Observed Feb 24, 2026Source link Provenance

Artifact (1)

Machine-readable schemas

OpenAPI or schema references published

contracthigh

Observed Feb 24, 2026Source link Provenance

Security (1)

Handshake status

UNKNOWN

trustmedium

Observed unknownSource link Provenance

Integration (1)

Crawlable docs

6 indexed pages on the official domain

search_documentmedium

Observed Apr 15, 2026Source link Provenance

Release & Crawl Timeline

Merged public release, docs, artifact, benchmark, pricing, and trust refresh events.

Self-declaredagent-index

Docs Update

Docs refreshed: Sign in to GitHub · GitHub

search_documentmedium

Fresh crawlable documentation was indexed for the official domain.

Observed Apr 15, 2026

Artifacts Archive

Extracted files, examples, snippets, parameters, dependencies, permissions, and artifact metadata.

Self-declaredGITHUB OPENCLEW

Extracted files

Examples

Snippets

Languages

typescript

Parameters

Executable Examples

bash

# Get your API key at https://xproof.app (connect wallet > API Keys)
./scripts/certify.sh path/to/file.pdf

bash

curl -X POST https://xproof.app/api/proof \
  -H "Content-Type: application/json" \
  -d "{\"file_hash\": \"$FILE_HASH\", \"filename\": \"file.pdf\"}"

bash

# x402 payment flow — no account needed
FILE_HASH=$(sha256sum file.pdf | awk '{print $1}')

curl -X POST https://xproof.app/api/proof \
  -H "Content-Type: application/json" \
  -d "{\"file_hash\": \"$FILE_HASH\", \"filename\": \"file.pdf\"}"

# Returns 402 with payment requirements
# Sign payment in USDC on Base, resend with X-PAYMENT header

bash

curl -s https://xproof.app/proof/{proof_id}.json | jq .

bash

curl -s https://xproof.app/proof/{proof_id}.json | jq .

bash

curl -X POST https://xproof.app/api/batch \
  -H "Authorization: Bearer pm_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{

Docs & README

Full documentation captured from public sources, including the complete README when available.

Self-declaredGITHUB OPENCLEW

Docs source

GITHUB OPENCLEW

Editorial quality

ready

Full README

name: xproof description: Certify files on MultiversX blockchain via xProof. Use when the user wants to prove file existence, create a proof of ownership, certify a document or code artifact, verify an existing certification, or anchor agent outputs on-chain. Supports single file, batch (up to 50 files), and x402 payment (no API key needed). Starting at $0.05 per proof, price decreases as the network grows. See https://xproof.app/api/pricing

xProof: Blockchain Certification on MultiversX

Proof primitive for AI agents and humans. Certify any file's existence and ownership by anchoring its SHA-256 hash on the MultiversX blockchain. Files never leave your machine — only the hash is sent.

What is xProof?

xProof creates immutable, verifiable proofs of existence and ownership on MultiversX:

Proof of Existence — Prove a file existed at a specific point in time
Proof of Ownership — Attach your identity to a certified file
Tamper Detection — Any modification to the original file produces a different hash, invalidating the proof
Agent Provenance — Agents can prove "I produced this output, at this time, unmodified"

Website: https://xproof.app API Docs: https://xproof.app/docs

Protocols Supported

| Protocol | Description | |----------|-------------| | x402 | HTTP-native payment — no API key needed, pay per request in USDC on Base | | ACP | Agent Commerce Protocol (OpenAI + Stripe compatible) | | MCP | Model Context Protocol — JSON-RPC 2.0 at POST /mcp | | MX-8004 | MultiversX Trustless Agents Standard — on-chain reputation |

Quick Start

1. Certify a File (with API key)

# Get your API key at https://xproof.app (connect wallet > API Keys)
./scripts/certify.sh path/to/file.pdf

2. Certify Without API Key (x402)

# x402 payment flow — no account needed
FILE_HASH=$(sha256sum file.pdf | awk '{print $1}')

curl -X POST https://xproof.app/api/proof \
  -H "Content-Type: application/json" \
  -d "{\"file_hash\": \"$FILE_HASH\", \"filename\": \"file.pdf\"}"

# Returns 402 with payment requirements
# Sign payment in USDC on Base, resend with X-PAYMENT header

3. Verify a Proof

curl -s https://xproof.app/proof/{proof_id}.json | jq .

4. Batch Certify (up to 50 files)

curl -X POST https://xproof.app/api/batch \
  -H "Authorization: Bearer pm_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "files": [
      {"file_hash": "abc123...", "filename": "report.pdf"},
      {"file_hash": "def456...", "filename": "data.csv"}
    ]
  }'

Environment Variables

| Variable | Description | Required | |----------|-------------|----------| | XPROOF_API_KEY | API key (format: pm_xxx). Get one at https://xproof.app | No (not needed with x402) | | XPROOF_API_URL | API base URL (default: https://xproof.app) | No |

API Reference

Certify a File

POST /api/proof
Authorization: Bearer pm_xxx

{
  "file_hash": "sha256-hex-string (64 chars)",
  "filename": "document.pdf",
  "author_name": "Agent Name",
  "webhook_url": "https://your-agent.example.com/webhooks/xproof"
}

Response:

{
  "proof_id": "uuid",
  "verify_url": "https://xproof.app/proof/uuid",
  "blockchain": {
    "transaction_hash": "abc123...",
    "explorer_url": "https://explorer.multiversx.com/transactions/abc123..."
  }
}

Verify a Proof

GET /proof/{proof_id}.json

Returns full proof details including file hash, timestamp, blockchain transaction, and verification status.

Batch Certify

POST /api/batch
Authorization: Bearer pm_xxx

{
  "files": [
    {"file_hash": "...", "filename": "..."},
    {"file_hash": "...", "filename": "..."}
  ]
}

Certify up to 50 files in a single API call.

Discover Services

GET /api/acp/products

Returns available services, pricing, and capabilities. No authentication required.

How It Works

Hash locally — SHA-256 hash is computed on your machine (file never leaves)
Send hash — Only the 64-char hex hash + filename are sent to xProof
Anchor on-chain — xProof records the hash on MultiversX blockchain
Get proof — Receive verification URL, badge SVG, and attestation JSON

Costs

Starting at $0.05 per certification — price decreases globally as the network grows
Paid in EGLD (with API key) or USDC on Base (with x402)
Current pricing & tiers: https://xproof.app/api/pricing

Webhook Notifications

xProof sends a POST to your webhook_url when the proof is confirmed on-chain:

{
  "event": "proof.certified",
  "proof_id": "uuid",
  "file_hash": "sha256...",
  "verify_url": "https://xproof.app/proof/uuid",
  "blockchain": {
    "transaction_hash": "abc...",
    "explorer_url": "https://explorer.multiversx.com/transactions/abc..."
  }
}

Signed with HMAC-SHA256 via X-xProof-Signature header.

MX-8004 Integration

Every certification is automatically registered as a validated job in the MX-8004 registries, building verifiable on-chain reputation for your agent.

Verification Badge

Embed a live verification badge in your README:

[![xProof Verified](https://xproof.app/badge/{proof_id})](https://explorer.multiversx.com/transactions/{tx_hash})

Contract & API

Machine endpoints, protocol fit, contract coverage, invocation examples, and guardrails for agent-to-agent use.

Verifiedcapability-contract

Endpoints

Dossier API Snapshot API Contract API Trust API

Contract coverage

Status

ready

Auth

mcp, api_key

Streaming

Yes

Data region

global

Protocol support

MCP: verified

Requires: mcp, lang:typescript, streaming

Forbidden: none

Guardrails

Operational confidence: medium

Contract is available with explicit auth and schema references.

Trust confidence is not low and verification freshness is acceptable.

Protocol support is explicitly confirmed in contract metadata.

Invocation examples

curl -s "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/snapshot"

curl -s "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract"

curl -s "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/trust"

Reliability & Benchmarks

Trust and runtime signals, benchmark suites, failure patterns, and practical risk constraints.

Missingruntime-metrics

Trust signals

Handshake

UNKNOWN

Confidence

unknown

Attempts 30d

unknown

Fallback rate

unknown

Runtime metrics

Observed P50

unknown

Observed P95

unknown

Rate limit

unknown

Estimated cost

unknown

No benchmark suites or observed failure patterns are available.

Media & Demo

Every public screenshot, visual asset, demo link, and owner-provided destination tied to this agent.

Missingno-media

No screenshots, media assets, or demo links are available.

Related Agents

Neighboring agents from the same protocol and source ecosystem for comparison and shortlist building.

Self-declaredprotocol-neighbors

GITLAB_AI_CATALOGgitlab-mcp

Rank

A Model Context Protocol (MCP) server for GitLab

Traction

No public download signal

Freshness

Updated 2d ago

MCP

GITLAB_PUBLIC_PROJECTSgitlab-mcp

Rank

A Model Context Protocol (MCP) server for GitLab

Traction

No public download signal

Freshness

Updated 2d ago

MCP

GITLAB_AI_CATALOGrmcp-openapi

Rank

Expose OpenAPI definition endpoints as MCP tools using the official Rust SDK for the Model Context Protocol (https://github.com/modelcontextprotocol/rust-sdk)

Traction

No public download signal

Freshness

Updated 2d ago

MCP

GITLAB_AI_CATALOGrmcp-actix-web

Rank

An actix_web backend for the official Rust SDK for the Model Context Protocol (https://github.com/modelcontextprotocol/rust-sdk)

Traction

No public download signal

Freshness

Updated 2d ago

MCP

Machine Appendix

Contract JSON

{
  "contractStatus": "ready",
  "authModes": [
    "mcp",
    "api_key"
  ],
  "requires": [
    "mcp",
    "lang:typescript",
    "streaming"
  ],
  "forbidden": [],
  "supportsMcp": true,
  "supportsA2a": false,
  "supportsStreaming": true,
  "inputSchemaRef": "https://github.com/jasonxkensei/xproof-openclaw-skill#input",
  "outputSchemaRef": "https://github.com/jasonxkensei/xproof-openclaw-skill#output",
  "dataRegion": "global",
  "contractUpdatedAt": "2026-02-24T19:41:50.727Z",
  "sourceUpdatedAt": "2026-02-24T19:41:50.727Z",
  "freshnessSeconds": 4420871
}

Invocation Guide

{
  "preferredApi": {
    "snapshotUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/snapshot",
    "contractUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "trustUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/trust"
  },
  "curlExamples": [
    "curl -s \"https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/snapshot\"",
    "curl -s \"https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract\"",
    "curl -s \"https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/trust\""
  ],
  "jsonRequestTemplate": {
    "query": "summarize this repo",
    "constraints": {
      "maxLatencyMs": 2000,
      "protocolPreference": [
        "MCP"
      ]
    }
  },
  "jsonResponseTemplate": {
    "ok": true,
    "result": {
      "summary": "...",
      "confidence": 0.9
    },
    "meta": {
      "source": "GITHUB_OPENCLEW",
      "generatedAt": "2026-04-16T23:43:02.493Z"
    }
  },
  "retryPolicy": {
    "maxAttempts": 3,
    "backoffMs": [
      500,
      1500,
      3500
    ],
    "retryableConditions": [
      "HTTP_429",
      "HTTP_503",
      "NETWORK_TIMEOUT"
    ]
  }
}

Trust JSON

{
  "status": "unavailable",
  "handshakeStatus": "UNKNOWN",
  "verificationFreshnessHours": null,
  "reputationScore": null,
  "p95LatencyMs": null,
  "successRate30d": null,
  "fallbackRate": null,
  "attempts30d": null,
  "trustUpdatedAt": null,
  "trustConfidence": "unknown",
  "sourceUpdatedAt": null,
  "freshnessSeconds": null
}

Capability Matrix

{
  "rows": [
    {
      "key": "MCP",
      "type": "protocol",
      "support": "supported",
      "confidenceSource": "contract",
      "notes": "Confirmed by capability contract"
    },
    {
      "key": "prove",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    }
  ],
  "flattenedTokens": "protocol:MCP|supported|contract capability:prove|supported|profile"
}

Facts JSON

[
  {
    "factKey": "docs_crawl",
    "category": "integration",
    "label": "Crawlable docs",
    "value": "6 indexed pages on the official domain",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  },
  {
    "factKey": "vendor",
    "category": "vendor",
    "label": "Vendor",
    "value": "Jasonxkensei",
    "href": "https://github.com/jasonxkensei/xproof-openclaw-skill",
    "sourceUrl": "https://github.com/jasonxkensei/xproof-openclaw-skill",
    "sourceType": "profile",
    "confidence": "medium",
    "observedAt": "2026-02-24T19:43:14.176Z",
    "isPublic": true
  },
  {
    "factKey": "protocols",
    "category": "compatibility",
    "label": "Protocol compatibility",
    "value": "MCP",
    "href": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "sourceUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:41:50.727Z",
    "isPublic": true
  },
  {
    "factKey": "auth_modes",
    "category": "compatibility",
    "label": "Auth modes",
    "value": "mcp, api_key",
    "href": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "sourceUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:41:50.727Z",
    "isPublic": true
  },
  {
    "factKey": "schema_refs",
    "category": "artifact",
    "label": "Machine-readable schemas",
    "value": "OpenAPI or schema references published",
    "href": "https://github.com/jasonxkensei/xproof-openclaw-skill#input",
    "sourceUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:41:50.727Z",
    "isPublic": true
  },
  {
    "factKey": "handshake_status",
    "category": "security",
    "label": "Handshake status",
    "value": "UNKNOWN",
    "href": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/trust",
    "sourceUrl": "https://xpersona.co/api/v1/agents/jasonxkensei-xproof-openclaw-skill/trust",
    "sourceType": "trust",
    "confidence": "medium",
    "observedAt": null,
    "isPublic": true
  }
]

Change Events JSON

[
  {
    "eventType": "docs_update",
    "title": "Docs refreshed: Sign in to GitHub · GitHub",
    "description": "Fresh crawlable documentation was indexed for the official domain.",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  }
]

xproof answer-first brief

Executive Summary

Evidence Ledger

Release & Crawl Timeline

Artifacts Archive

Docs & README

xProof: Blockchain Certification on MultiversX

What is xProof?

Protocols Supported

Quick Start

1. Certify a File (with API key)

2. Certify Without API Key (x402)

3. Verify a Proof

4. Batch Certify (up to 50 files)

Environment Variables

API Reference

Certify a File

Verify a Proof

Batch Certify

Discover Services

How It Works

Costs

Webhook Notifications

MX-8004 Integration

Verification Badge

Links

Contract & API

Reliability & Benchmarks

Media & Demo

Related Agents