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badhttp

payment-readyonline

payment-ready until 2026-10-30

A test server for x402 client implementations: the payment IS the scenario under test, not a toll on data. /402/pay/base is a real, settling x402 paywall (0.01 USDC on Base by default, ?

badhttp.dev ↗

Call it x402 v2

x402 v2

Base URL
https://badhttp.dev
Payment
x402 v2, header channel
$ curl -i 'https://badhttp.dev/402/pay'

An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.

Endpoints 3 paid routes on badhttp.dev

GET/402/payBase Sepolia---since 09-08
GET/402/pay/baseBase$0.01since 09-08
GET/402/pay/base-sepoliaBase Sepolia---since 09-08

Prices as captured in the 402 response: $0.01.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
MethodPathDescriptionPriceNetworkAsset402 channelCaptured
GET/402/paybadhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base Sepolia (testnet) and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose. Test USDC; /402/pay/base is the same paywall for real USDC on Base mainnet.---Base SepoliaUSDCheadersince 09-08
GET/402/pay/basebadhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base mainnet and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose.$0.01BaseUSDCheadersince 09-08
GET/402/pay/base-sepoliabadhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base Sepolia (testnet) and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose. Test USDC; /402/pay/base is the same paywall for real USDC on Base mainnet.---Base SepoliaUSDCheadersince 09-08

Payment evidence

402 payload captured at . Check evidence JSON · Measurement methodology.

First of 3 payloads captured by the monitor.

128 lines, scroll inside

{
  "accepts": [
    {
      "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
      "extra": {
        "name": "USDC",
        "version": "2",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:84532",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://badhttp.dev/402/pay",
    "tags": [
      "testing",
      "http",
      "x402",
      "edge-cases",
      "developer-tools"
    ],
    "mimeType": "application/json",
    "description": "badhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base Sepolia (testnet) and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose. Test USDC; /402/pay/base is the same paywall for real USDC on Base mainnet.",
    "serviceName": "badhttp"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "paid": true,
            "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
            "payer": "0x0000000000000000000000000000000000000000",
            "pay_to": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
            "network": "eip155:84532",
            "explorer": "https://sepolia.basescan.org/tx/0x0000000000000000000000000000000000000000000000000000000000000000",
            "scenario": "/402/pay",
            "amount_usd": 0.01,
            "real_money": false,
            "facilitator": "https://example.invalid",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "network_name": "base-sepolia",
            "amount_atomic": "10000"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "amount": {
                    "type": "string",
                    "pattern": "^\\d+(\\.\\d{1,6})?$",
                    "description": "price in USD, 0.001-1, default 0.01"
                  },
                  "network": {
                    "enum": [
                      "base",
                      "base-sepolia"
                    ],
                    "type": "string",
                    "description": "base-sepolia is test USDC (the default); base is real USDC on Base mainnet"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}
Other captured 402 responses (2)

Captured payload 2 of 3

{
  "accepts": [
    {
      "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
      "extra": {
        "name": "USDC",
        "version": "2",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:84532",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://badhttp.dev/402/pay/base-sepolia",
    "tags": [
      "testing",
      "http",
      "x402",
      "edge-cases",
      "developer-tools"
    ],
    "mimeType": "application/json",
    "description": "badhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base Sepolia (testnet) and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose. Test USDC; /402/pay/base is the same paywall for real USDC on Base mainnet.",
    "serviceName": "badhttp"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "paid": true,
            "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
            "payer": "0x0000000000000000000000000000000000000000",
            "pay_to": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
            "network": "eip155:84532",
            "explorer": "https://sepolia.basescan.org/tx/0x0000000000000000000000000000000000000000000000000000000000000000",
            "scenario": "/402/pay",
            "amount_usd": 0.01,
            "real_money": false,
            "facilitator": "https://example.invalid",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "network_name": "base-sepolia",
            "amount_atomic": "10000"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "amount": {
                    "type": "string",
                    "pattern": "^\\d+(\\.\\d{1,6})?$",
                    "description": "price in USD, 0.001-1, default 0.01"
                  },
                  "network": {
                    "enum": [
                      "base",
                      "base-sepolia"
                    ],
                    "type": "string",
                    "description": "base-sepolia is test USDC (the default); base is real USDC on Base mainnet"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 3 of 3

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://badhttp.dev/402/pay/base",
    "tags": [
      "testing",
      "http",
      "x402",
      "edge-cases",
      "developer-tools"
    ],
    "mimeType": "application/json",
    "description": "badhttp /402/pay: a real x402 v2 paywall for testing clients. Pay 0.01 USDC on Base mainnet and get a 200 with a PAYMENT-RESPONSE receipt and the transaction hash. Nothing else is sold; sibling endpoints under /402 misbehave on purpose.",
    "serviceName": "badhttp"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "paid": true,
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "payer": "0x0000000000000000000000000000000000000000",
            "pay_to": "0x2b14ad50d63c7fee5a33847f95153ac37a690170",
            "network": "eip155:8453",
            "explorer": "https://basescan.org/tx/0x0000000000000000000000000000000000000000000000000000000000000000",
            "scenario": "/402/pay",
            "amount_usd": 0.01,
            "real_money": true,
            "facilitator": "https://example.invalid",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "network_name": "base",
            "amount_atomic": "10000"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "amount": {
                    "type": "string",
                    "pattern": "^\\d+(\\.\\d{1,6})?$",
                    "description": "price in USD, 0.001-1, default 0.01"
                  },
                  "network": {
                    "enum": [
                      "base",
                      "base-sepolia"
                    ],
                    "type": "string",
                    "description": "base-sepolia is test USDC (the default); base is real USDC on Base mainnet"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

86/100 Solid

#28 of 136 in Verification. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability
100% uptime 30d
Compliance
A 14/14 checks pass
Price
$0.01 p45 in Verification
Risk
clean no risk flag
Traction
$0.06 30d 4 buyers, top buyer 50% (address, not entity)
14/14 compliance checks
  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

402 terms unchanged since 2026-09-08. Last up 2026-10-23.

── Site signals

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
How the score works

What the score read on this service: status online, 100% uptime 30d, 333ms response p95, x402 compliance 14 of 14, $0.01 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

It is a score inside Verification, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 136 listings, this one among them: the same 136 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Settled via coinbase ($0.05, 5 tx) and payAI ($0.01, 1 tx). Traction is a conservative undercount; first settlement seen 2026-10-05.

All measured facts

What it does

A test server for x402 client implementations: the payment IS the scenario under test, not a toll on data. /402/pay/base is a real, settling x402 paywall (0.01 USDC on Base by default, ?amount= 0.001-1.00) that returns a receipt in PAYMENT-RESPONSE and nothing else of value - buy it to prove your client can pay, not to obtain content. Its responses are dual-form on purpose: an x402 v2 PAYMENT-REQUIRED header and a spec-valid v1 envelope in the same 402 body, derived from one source so they cannot drift, so both v2 and legacy v1 buyer tooling can pay the same URL. Around it sit ~19 deliberately misbehaving payment scenarios that never settle and never contact a facilitator - a 402 that ignores every valid payment, one that asks for 1,000,000 USDC, one naming a nonexistent chain, one returning a corrupt receipt, and ten malformed 402 envelopes - so you can test what your client does when a paywall is broken or hostile. Also a free, no-signup catalogue of ~140 other HTTP edge cases (content codings, ranges, conditional requests, cookies, auth challenges, SSE) as machine-readable NDJSON at /corpus.jsonl. Stateless, no signup, nothing stored about callers. Costs and revenue are published on-chain-reconciled at /books.

badhttp is a listed x402 Verification API. Captured payment terms name Base, Base Sepolia. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.

Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.

Page rendered at . This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.

Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.

Observed daily coverage: 2026-09-24 to 2026-10-23 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: . Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.

Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.

x402 List home · Services · Verification

uptime · latest daily rollup
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
333ms
avg response
270ms
total checks
2,747

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

price (min)
$0.01
category percentile (min)
p45 in Verification
endpoints / prices
3 / 1
model
flat
stability
100%

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
59d
registrar
Porkbun LLC
hosting
custom
domain created
2026-08-23

Identity facts, not a risk score.

assessment volume 30d
$0.06
exact assessment volume 30d (USD)
0.06
assessment recorded at (UTC)
2026-10-23T18:53:02.903Z
buyers 30d
4
settlements 30d
6
measured since
2026-10-05 (start of our harvest window)
last settlement
2026-10-15
top buyer share
50% of 30d volume (address, not entity)
top 3 buyers share
83% of 30d volume (addresses, not entities)
concentrated volume
no
trend 7d vs 30d
0.00x the 30d daily rate
networks
eip155:8453
volume all-time
$0.06
settlements all-time
6
median settlement 30d
$0.01
max settlement 30d
$0.01

Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.

member since
2026-09-08
Recent checks
Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)StatusHTTPResponseEndpoints
Online402135ms3
Online402128ms3
Online402109ms3
Online40282ms3
Online402151ms3
Online402105ms3
Online402205ms3
Online40279ms3
Online40272ms3
Online402174ms3
Online402118ms3
Online402113ms3
Online40285ms3
Online40285ms3
Online402158ms3
Online40261ms3
Online402125ms3
Online402122ms3

Changes0 in 30d

No changes recorded in the last 30 days.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.06, peak $0.02 on 10-05
volume no data in the payload
Distinct buyers per dayDistinct buyers per day
Uptime 1 of 29 completed days below 100%
uptime below 100%, to scale
Volume 30d
$0.06
Uptime
1 of 29 completed days below 100%
Daily on-chain settlement volume in US dollars, 2026-09-24 to 2026-10-23; highest day $0.02 on 10-05; 25 days have no data in the payload; distinct buyers per day
More charts
Response time daily average, ms min 116ms, avg 267ms, max 564ms

09-24 to 10-23* UTC

Scores over time

x402 compliance low 14/14, high 14/14

09-24 to 10-23* UTC

Price percentile in Verification own low to high; exact values below

09-24 to 10-23* UTC

Site signals present (of 6) own low to high; exact values below

09-24 to 10-23* UTC

Scores: one day per column, 09-24 to 10-23*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.

Each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/badhttp/price, /scores, /volume and /buyers.

Values

* today so far, partial (UTC).

The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.

Daily snapshot total, 30d: $0.06, peak $0.02 on 10-05. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.

Daily address snapshots: 2026-09-24 to 2026-10-23 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.

Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.

Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-24 to 2026-10-23: address settlement volume in USD, distinct buyer and settlement counts, uptime percent, average response milliseconds, compliance passed/total, price percentile 0-100, site signals out of 6; UTC dates
DayVolumeBuyersSettlementsUptimeResponseCompliancePrice percentileSite signals
2026-09-24no datano datano data100%368.41ms14/14p473/6
2026-09-25no datano datano data100%369.50ms14/14p473/6
2026-09-26no datano datano data100%202.51ms14/14p463/6
2026-09-27no datano datano data100%127.92ms14/14p453/6
2026-09-28no datano datano data100%262.29ms14/14p453/6
2026-09-29no datano datano data100%201.44ms14/14p443/6
2026-09-30no datano datano data100%190.92ms14/14p443/6
2026-10-01no datano datano data100%198.60ms14/14p443/6
2026-10-02no datano datano data100%209.18ms14/14p443/6
2026-10-03no datano datano data100%201.86ms14/14p443/6
2026-10-04no datano datano data100%224.72ms14/14p443/6
2026-10-05$0.0212100%431.02ms14/14p443/6
2026-10-06$0.0111100%450.34ms14/14p443/6
2026-10-07no datano datano data100%479.96ms14/14p443/6
2026-10-08no datano datano data98.89%563.51ms14/14p443/6
2026-10-09$0.0111100%249.43ms14/14p443/6
2026-10-10no datano datano data100%241.00ms14/14p443/6
2026-10-11$0.0111100%193.38ms14/14p443/6
2026-10-12no datano datano data100%226.07ms14/14p443/6
2026-10-13no datano datano data100%213.31ms14/14p443/6
2026-10-14no datano datano data100%268.83ms14/14p443/6
2026-10-15$0.0111100%270.19ms14/14p443/6
2026-10-16no datano datano data100%336.68ms14/14p443/6
2026-10-17no datano datano data100%375.83ms14/14p443/6
2026-10-18no datano datano data100%233.73ms14/14p443/6
2026-10-19no datano datano data100%175.88ms14/14p443/6
2026-10-20no datano datano data100%209.42ms14/14p443/6
2026-10-21no datano datano data100%259.75ms14/14p443/6
2026-10-22no datano datano data100%144.47ms14/14p443/6
2026-10-23*no datano datano data100%116.28ms14/14p453/6

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scvd.store · evidence observatory for the x402 economy strong 93/100 100% up 30d $239.63 30d
Rubric Protocol · Post-Quantum AI Attestation solid 92/100 100% up 30d $12.49 30d
Agent Embassy solid 91/100 99.7% up 30d $19.17 30d
KushBitx AgentProof solid 90/100 100% up 30d $0.01 30d
Limitguard solid 89/100 99.8% up 30d $13.80 30d

5 of 135 other ranked services in Verification, ordered by the same measured score.

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Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

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