Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub · AI
xProof — Blockchain Proof for Agents
Certify agent outputs on the MultiversX blockchain. Anchor hashes, text, files, and decisions with tamper-proof on-chain proof. $0.05/cert, 6-second finality...
skill openclawclawhub Free
Certify agent outputs on the MultiversX blockchain. Anchor hashes, text, files, and decisions with tamper-proof on-chain proof. $0.05/cert, 6-second finality...
⬇ 0 downloads ★ 0 stars Unverified but indexed
Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.2.0
Provenance
- Publisher
- jasonxkensei
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
xProof — Blockchain Proof of Existence for Agents
xProof anchors agent outputs to the MultiversX blockchain. Any text, hash, file, or decision becomes a permanent, tamper-proof record with a verifiable on-chain certificate. Use this skill when: Certifying agent outputs, decisions, or reports that need to be verifiable Anchoring content before it is shared, published, or acted upon Building audit trails for autonomous agent pipelines Proving a document or output existed at a specific point in time
Authentication
Option 1 — API Key (recommended): Set XPROOF_API_KEY in your environment. Get a key at https://xproof.app. Option 2 — x402 (no account required): Send USDC on Base. The API returns a 402 with payment instructions; include the X-Payment header (base64-encoded JSON) in your follow-up request.
Certify Text or a Hash
# Certify text content curl -s -X POST https://xproof.app/api/proof \ -H "Authorization: Bearer $XPROOF_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "content": "The agent decided: deploy to production at 2026-02-20T14:00:00Z", "metadata": {"agent": "deploy-bot", "pipeline": "release-v2.1"} }' # Certify a SHA-256 hash (if you already have it) curl -s -X POST https://xproof.app/api/proof \ -H "Authorization: Bearer $XPROOF_API_KEY" \ -H "Content-Type: application/json" \ -d '{"hash": "sha256:<64-char-hex>"}' Response: { "id": "cert_abc123", "status": "pending", "hash": "sha256:...", "txHash": "...", "blockchainUrl": "https://explorer.multiversx.com/transactions/...", "verifyUrl": "https://xproof.app/verify/cert_abc123", "certifiedAt": "2026-02-20T14:00:05Z" }
Certify a File
# Hash a file locally and certify the hash FILE_HASH=$(sha256sum report.pdf | awk '{print $1}') curl -s -X POST https://xproof.app/api/proof \ -H "Authorization: Bearer $XPROOF_API_KEY" \ -H "Content-Type: application/json" \ -d "{\"hash\": \"sha256:${FILE_HASH}\", \"metadata\": {\"filename\": \"report.pdf\"}}"
Batch Certify (up to 50)
curl -s -X POST https://xproof.app/api/batch \ -H "Authorization: Bearer $XPROOF_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "proofs": [ {"content": "Output 1"}, {"content": "Output 2"}, {"hash": "sha256:<hash-3>"} ] }'
Verify a Certificate
# By certificate ID curl -s https://xproof.app/api/proof/cert_abc123 # Response includes on-chain status: pending | confirmed | failed
MX-8004 Integration (MultiversX Agent Validation Loop)
xProof implements the full MX-8004 validation loop. To submit a certified proof as an on-chain MX-8004 validation: # Step 1: Certify the output CERT=$(curl -s -X POST https://xproof.app/api/proof \ -H "Authorization: Bearer $XPROOF_API_KEY" \ -H "Content-Type: application/json" \ -d '{"content": "Agent output to validate"}') CERT_ID=$(echo $CERT | jq -r '.id') CERT_HASH=$(echo $CERT | jq -r '.hash') # Step 2: Submit as MX-8004 proof (handled by xProof internally) # xProof anchors on MultiversX and calls giveFeedback on the Validation Registry. # The verifyUrl in the response is the permanent on-chain reference. echo "Certificate: $CERT_ID" echo "Verify at: $(echo $CERT | jq -r '.verifyUrl')"
x402 Payment (No Account Required)
# Step 1: Attempt the request — receive 402 RESPONSE=$(curl -s -w "\n%{http_code}" -X POST https://xproof.app/api/proof \ -H "Content-Type: application/json" \ -d '{"content": "Certify this"}') HTTP_CODE=$(echo "$RESPONSE" | tail -1) BODY=$(echo "$RESPONSE" | head -1) if [ "$HTTP_CODE" = "402" ]; then # Step 2: Parse payment instructions and pay with USDC on Base # Then resubmit with X-Payment header (base64-encoded payment JSON) echo "Payment required: $(echo $BODY | jq -r '.accepts[0]')" fi
MCP Server
xProof exposes an MCP server at https://xproof.app/mcp. Add to your OpenClaw config: { "mcp": { "servers": { "xproof": { "url": "https://xproof.app/mcp", "headers": {"Authorization": "Bearer ${XPROOF_API_KEY}"} } } } } Available MCP tools: certify_content, certify_hash, certify_batch, verify_proof.
Pricing
VolumePrice0 - 100K certs/month$0.05/cert100K - 1M certs/month$0.025/cert1M+ certs/month$0.01/cert Check current pricing: curl https://xproof.app/api/pricing
Security & Privacy
Content submitted via content field is hashed server-side before anchoring; the original text is not stored on-chain. Only the SHA-256 hash and optional metadata are written to MultiversX. API keys are scoped to a single account and can be rotated at https://xproof.app. x402 payments are processed on Base; no account or email required. External endpoints called: https://xproof.app only. By using this skill, hashes and optional metadata are sent to xproof.app for blockchain anchoring on MultiversX.
Resources
Homepage: https://xproof.app API docs: https://xproof.app/llms.txt Full reference: https://xproof.app/llms-full.txt Agent manifest: https://xproof.app/.well-known/agent.json MCP Registry: https://registry.modelcontextprotocol.io/v0/servers?search=xproof MultiversX explorer: https://explorer.multiversx.com
Category context
Agent frameworks, memory systems, reasoning layers, and model-native orchestration.
Source: Tencent SkillHub
Largest current source with strong distribution and engagement signals.
Package contents
Included in package
1 Docs
- SKILL.md